1,802 research outputs found
Story of Adeline Yen Mah
No full textProducer, Eleanor Morris ; narrator, Connie Booth.Adeline Yen Mah, the author of Falling leaves, traces her and her family's life from Shanghai of the 1930s to the Cultural Revolution, through her life as a doctor in California
Self-access English Language Enrichment Hub (SELEH): the OER booster / Mah Boon Yih
No full textSince the COVID-19 epidemic seized the world by storm in early 2020, e-learning has been embraced as the only way to secure
the continuation of academic activity. In response to the economic and social activities lockdown, which has resulted in a halt in
face-to-face teaching and learning activities, Assoc. Prof. Dr Mah Boon Yih, a Microsoft Innovative Educator Expert (2021 -2022)
and Microsoft Innovative Educator Master Trainer, initiated Self-access English Language Enrichment Hub or SELEH, which is
accessible at https://www.wecwi.com/post/seleh .SELEH is one of the Open Educational Resources (OER) licensed under CC BY -NC-SA 4.0. It is formulated based on RACQAIL attributes, which stands for Relevance, Accuracy, Clarity, Quality, Accessibility, Interactivity, and Licensing. It provides flexibility and equitable opportunity to utilise learning resources, resulting in increased accessibility and openness in education (Ehlers, 2011). According to UNESCO, OER are "teaching, learning, and research materials in any medium-digital or otherwise-that are in the public domain or have been released under an open licence that permits no-cost access, use, adaptation, and redistribution by others with no or limited restrictions.
STRUKTUR AJARAN TATTWA SANGHYANG MAH?J?NA
No full textSanghyang Mahajnana Tattwa is one of the lontars which is categorized as Tattwa. It contains jana (knowledge) and the essence of the teachings describe about kal?pasan (knowledge to reach a freedom in life). Sanghyang Mah?j?na Tattwa also consists of Brahmawidy? (Hindu Theology) teachings. However, there are only few studies related to Sanghyang Mahajnana Tattwa teachings. it makes the topic regarding Sanghyang Mah?j?na Tattwa is interested to be explored more in the further research. This study aims to describe the teaching structure of Sanghyang Mah?j?na Tattwa, including: knowledge of sleep (maturu, suptam) and conscious (matanghi, jagra), knowledge about duality (Puru?a and Pradh?na), knowledge of Trimurti, knowledge of human nature, knowledge of Sanghyang O?k?ra as the way to reach freedom (kal?pasan). The methodology used was study literature with qualitative approach. The study emphasized on explaining about the teaching structure of Sanghyang Mah?j?na Tattwa.Keywords: Sanghyang Mahajnana Tattwa, structure, teaching
Wallastra elenderae Mah 2018, n. gen.
No full textWallastra elenderae n. gen. n. sp. Figure 37 A–G Type species. Wallastra elenderae n. sp. by monotypy. Etymology. This genus and species are named for dear friend, opera singer, and co-author of the textbook Introductory Physics, Ms. Elender Wall (1969–2016). Diagnosis. Body strongly stellate (R/r=3.46) with elongate, slender arms, weakly curved interradial arcs (Fig. 37A, F). Abactinal plates bare, surface mostly bare and smooth (Fig. 37B), especially on distal disk regions adjacent to superomarginals and along arms. Central disk plates with one to several, widely distributed button-like granules. Superomarginals wide to quadrate in shape, with mostly bare surface, or widely distributed coarse granules occur (Fig. 37D). Each actinal plate covered with closely articulated granules, most plates with a single large bivalve pedicellaria (Fig. 37E). Furrow spines four or five (Fig. 37G). Comments. Based on comparisons with other goniasterid taxa, the species described here cannot be easily reconciled with known goniasterid genera, and therefore the new genus Wallastra is recognized. Wallastra n. gen. lacks the crystalline tubercles embedded in the surface of the abactinal plates, which identifies all species of Astroceramus as well as the superomarginals abutted over the radius of each arm. Most species of Astroceramus also possess one or two enlarged subambulacral spines that are absent from Wallastra. Abactinal plates on Wallastra n. gen. possess one to approximately eight to 10 coarse granules embedded in the plate surface but are otherwise bare and smooth. Granules abruptly disappear on arm plates where abactinal plates become flatter and are entirely devoid of surficial accessories. This character is reminiscent of the abrupt change between plates that defines the difference between Circeaster and Lydiaster. In Circeaster, abactinal arm plates are abruptly larger whereas those in Lydiaster remain relatively similar in size on the arm and disk. However, Lydiaster possesses much larger and wider marginal plates with a stronger abactinal facing, a thicker and more stout body shape and widespread spinelets that are absent from Wallastra n. gen. Two species of Circeaster, C. sandrae (South and Central Pacific) and especially C. pullus (North Pacific) display similar abactinal and marginal plate patterns to both Wallastra n. gen. and Astroceramus. Occurrence. Solomon Islands and Western Indian Ocean, between Mayotte and the Glorioso Islands, 550–836 m. Description. Body strongly stellate (R/r=3.46), arms elongate, tapering. Interradial arcs weakly curved to nearly straight (Fig. 37A). Abactinal surface flat, composed of round to polygonal abutted plates (Fig. 37A, B), which are flush with superomarginal plate surface (Fig. 37D). Approximately three rows of abactinal plates (at R= 10.4 cm) extending along arm to terminus (Fig. 37C), decreasing in number to a single row of wide then very narrow, irregularly shaped, strongly convex plates along distalmost arm region. Plates largest and most polygonal along papular (radial regions) with smallest and most irregular plates occurring interradially. Plates with discrete peripheral row of quadrate to polygonal shaped granules,12–30, mostly 15–25, with approximately four to five granules present per side (Fig. 37B). Peripheral granules largest on disk occupying 1/3 to 1/5 of the total width of each plate becoming substantially smaller on arm plates, occupying only approximately 1/6 to 1/10 of the total plate distance. Peripheral granules on arm more rounded and nearly flush with plate surface versus those on disk which are raised and sit above the plane of the abactinal plate surface. Abactinal plate surfaces on the disk possess one to 15 (mostly two to six) large, coarse widely spaced granules but are otherwise smooth, bare and are mostly devoid of other structures or accessories. Granules are widely spaced on all but the plates flanking the polygonal shaped madreporite. Of the seven plates which flank the madreporite, four possess abundant and closely spaced coarse granules all but covering the plate surface. This side of the madreporite with granule-covered plates with one to two irregularly spaced rows of plates with similarly abundant granule-covered plates. Two plates observed each with a large paddle-shaped pedicellaria (approximately 1.5–2.0 mm width) present in the center of each plate. These large coarse button-like granules decrease in number farther away from the center of the disk, disappearing completely on the disk edge, arm base and along the surface of the arm plates. The absence of the button-like granule leaves a distinct concavity on the plate where it has been removed, otherwise the surface is flat and smooth. Papulae were extended on specimen examined with six numbering around each plate along radial regions at the base of each arm extending from the radial region of the disk. Superomarginal and inferomarginal plates, approximately 62–66 per interradius. Plates wide, quadrate in shape with flattened surface interradially but becoming more elongate and tumid distally, becoming much more strongly convex adjacent to arm tip. Superomarginals and inferomarginals with 1:1 correspondence interradially becoming more offset distally, showing a more zigzag contact along the arm. Distalmost three to four superomarginals abutted over midline. Superomarginals with one to approximately 25 coarse, round button-like, widely spaced granules present on each plate surface, granules are most abundant interradially, gradually decreasing and then disappearing completely along plates present on the arm (Fig. 37D). When removed, disk granules leave a distinct, concave pitting on the superomarginal plate surface. Inferomarginal plate surfaces show same general pattern but interradial plates also possess a dense row of coarse, polygonal granules identical to those which compose the peripheral granule layer around the marginal plates (Fig. 37D). Peripheral granules around superomarginals, polygonal to narrowly quadrate, approximately 30–80, mostly 40–60 forming (15 per edge) narrow border around superomarginal plates becoming nearly indistinct near arm terminus. Peripheral granules around inferomarginals similar in size and number except for those in contact with granules on the actinal plate surface, which are slightly larger than those on the other sides of the inferomarginal plate. Granules on the inferomarginal/actinal plate contact are much larger, coarser, in close contact, and similar in overall appearance. As with superomarginals, granules are most numerous interradially, with numbers decreasing and disappearing entirely on inferomarginal plate surface along the arm, especially distally adjacent to the arm terminus. Terminal plate is large, triangular in shape, approximately the size of four adjacent superomarginal plates, with bare surface and a large blunt spine on the tip. Actinal surface composed of approximately three full series in chevron-like pattern, with irregular incomplete series adjacent to contact with inferomarginal plates (Fig. 37E). Actinal plates quadrate to polygonal in outline, all plates on disk covered by coarse, closely distributed polygonal to round granules, four to 12 per plate. Approximately 1 granule counted along a 1.0 mm line. Actinal plates along arm with decreasing number of granules, in some cases disappearing from plate surface. Large (1.0–2.0 mm wide) trapezoid shaped pedicellariae (Figs. 37E, G), each with short, jagged complimentary valves, numbering one per plate, occurring on approximately 50% of actinal plates, variably present throughout each interradius. Furrow spines four in a linear series increasing to five distally, quadrate to triangular in cross-section with spines flattening out farther along arm, becoming individually narrower and more prominent (Fig. 37G). Variably, some spines are flattened and are more wedge-shaped. Furrow spines mostly blunt and smooth but most proximal spines with notches or some texturing on each spine tip. Furrow spines are set off by a discrete space, then two to four short triangular to rounded subambulacral spines, less than 25% of the length of each furrow spine. When only two subambulacrals are present, they occur on either side of the adambulacral plate, flanking a large bivalve pedicellaria with large rectangular valves with jagged tips, similar to those on actinal surface (Fig. 37G). Subambulacral spines transition from two short enlarged granules to a single enlarged blunt spine on distalmost adambulacral plates. Subambulacral pedicellariae occur in a continuous series along the adambulacral plates on the disk but gradually disappear along the transition from disk to arm. Pedicellariae are in turn, flanked by a row of three, large, blunt spines, quadrate to rounded in cross-section, which are two to three times as thick as the adjacent actinal granules. Pedicellariae set off from both the furrow spines and the thickened subambulacrals by discrete bare spaces. Pedicellariae are absent on a minority of plates, and are replaced by a series of two to four small polygonal granules similar to those on the actinal surface. Remainder of adambulacral surface covered by four to 20 thick, mostly 10 to 15 polygonal granules, best developed along arm after pedicellariae series has terminated. Oral plates with six to eight thick spines, ranging from thickened quadrate to flattened and triangular in crosssection with thin, flattened paddle like spines projecting into oral region from each paired oral plate. Oral plates with four or five thick subambulacral spines, each two to four times as thick as the furrow spines with six to eight, short paired, irregular, triangular granules on each side of the oral plate contact along the midline. Color in life, disk is light orange with darker orange arms and solid dark marginal plates. Material Examined. Holotype: MNHN-IE-2013-17165. Western Indian Ocean, between Mayotte and the Glorioso Islands, 12° 18 'S, 46° 27' E to 12 ° 17 'S, 46 ° 28' E, 842– 836m, Coll. S. Samadi et al. BIOMAGLO DW 4792, 22 Jan 2017, leg 1. 1 wet spec. R=10.4 r=3.0. Paratype: IE-2007-1291. Solomon Islands 8°16’S 160° 43’E, 550 m, Coll. Richer & Boissellier, 15 Sept. 2007. N/ O Alis, SALOMONBOA 3 DW 2792 1 wet spec. R=9.3 (arm twisted) r=3.2Published as part of Mah, Christopher L., 2018, New genera, species and occurrence records of Goniasteridae (Asteroidea; Echinodermata) from the Indian Ocean, pp. 1-116 in Zootaxa 4539 (1) on pages 98-100, DOI: 10.11646/zootaxa.4539.1.1, http://zenodo.org/record/261591
Neoferdina annae Mah, 2017, n. sp.
No full text<i>Neoferdina annae</i> n. sp. <p>Figure 13 A–F</p> <p> <b>Etymology.</b> This species is named for my colleague and friend Anna Sutton.</p> <p> <b>Diagnosis.</b> This species is distinctive for having a nearly continuous granular tegument which covers all plate surfaces save for the paired bald circles on the paired penultimate superomarginals. Abactinal plates are flat and mostly homogeneous in size and shape with no large, convex plates as seen in most other <i>Neoferdina</i> species. Distalmost superomarginal plates are abutted at arm tip.</p> <p> <b>Taxonomic comments.</b> This species is similar to <i>Neoferdina insolita</i>, in that it shares the absence of large, convex bald plates on the abactinal surface. It differs from nearly all other <i>Neoferdina</i> species in that there are no bald patches on the surfaces of the superomarginal or inferomarginal plates, save for the two superomarginals adjacent to the terminal.</p> <p> <i>Neoferdina annae</i> <b>n. sp.</b> invites comparison with <i>Paraferdina laccadivensis</i> with which it shares several characters, including the flat, round shaped, and numerous abactinal plates and especially the granular tegument covering the surface, including all of the marginal plates, nearly all of which are lacking bare patches. <i>Neoferdina annae</i> <b>n. sp.</b> differs in that it possesses a single circular bare patch on each of two penultimate superomarginals, and elongate superomarginals in contrast to <i>P. laccadivensis</i> which displays no known bare patches on the superomarginals and which has more quadrate to elongate superomarginals. <i>N. annae</i> also displays a more stellate body shape with more triangular shaped arms that are more similar to those in <i>Neoferdina</i> than in <i>Paraferdina</i>. Given these character differences between <i>N. annae</i> and <i>P laccadivensis</i>, this species creates ambiguity at the taxonomic boundary between these two genera. Further phylogenetic testing is needed to properly establish the boundaries for these genera.</p> <p> <b>Occurrence.</b> Balut Island, Philippines. approximately 100–150 m.</p> <p> <b>Description.</b> Body stellate (R/r=3.36–4.25), arms triangular in shape with weakly curved interradial arcs (Figs. 13 A, B). Body flattened.</p> <p>Abactinal surface flattened, plates oval to circular to irregularly polygonal, (Figs. 13 A, B). Plate surface flat to weakly convex, mostly homogeneous in size but with smaller more homogeneously sized plates adjacent to contact with superomarginal plates. Abactinal plates covered with continuous granular tegument extending onto marginal and actinal plate surfaces. Individual granules fine, 10–30, usually 20 along a 1.0 mm line. If granular tegument is removed, plate surfaces are smooth and reddish in color with no convexities or other structures. glassy nodules absent. Granules obscuring plate boundaries on abactinal surface, but darker in color between plates. Abactinal plates five or six along arm base, tapering out to a single series where superomarginals abut over midline. Carinal series with irregular plates variably smaller and oval shaped to three times as large and round in shape, alternating in series (Fig. 13 B). Papulae distinct, ranging from four to eight surrounding each abactinal plate, primarily occurring along arm and basal arm regions on disk. Absent from interradial regions and central disk regions. Madreporite polygonal to round, sulci well developed. Pedicellariae absent.</p> <p>Superomarginal plates 21–32 per interradius (arm tip to arm tip), inferomarginals 22–26 per interradius in the holotype (Fig. 13 A), 34–36 in the paratype. Proximal marginal plates with 1:1 correspondence becoming more offset distally along the arms. Proximalmost superomarginals wide and quadrate in shape with subsequent plates becoming more elongate along arm becoming more quadrate adjacent to terminal plate. Superomarginal surface weakly convex to flat (Figs 13 B,C). Some segments along arm smaller, irregular in shape (presumably from damage). Superomarginal contact with abactinal plates round and convex. Distalmost two to three superomarginals abutted over midline (Fig. 13 D). Granular tegument on marginal plates continuous from abactinal plate surface save for one distinct round bald, dark colored patch on the surface of distalmost superomarginals, on the holotype patches are restricted to paired superomarginals adjacent to the terminal plate (Figs. 13 D, F). Thus, each arm with paired dark spots on each arm tip. Inferomarginal plates broadly similar in overall size and shape distribution. Distalmost inferomarginals covered with coarser granules, several bearing thorny to spine-like tips. Single short granular spinelet present on two to three inferomarginals adjacent to the terminal. Inferomarginal adjacent to terminal plate also strongly convex. Terminal plates triangular in shape, with no granular tegument. No pedicellariae observed.</p> <p>Actinal surface composed of five to six actinal intermediate series, four of which terminate along the arm at various points away from the disk (Fig. 13 E). Two incomplete actinal intermediate plate series on disk. Individual actinal plates quadrate to polygonal in shape. Actinal surface covered by same continuous granular integument covering abactinal and marginal surface. No spines or other accessories present on actinal surface other than granular integument. Furrow spines, round and quadrate in cross-section, present in a single series along adambulacral furrow. Two to three (mostly three) short blunt spines per adambulacral plate. Granular integument extends up to base and half-way along spines. Oral plates with a large oral spine on each paired plate, each projecting into mouth. Thus, two oral spines project into the mouth per interradius. Each of these, approximately two to three times as thick as the furrow spines. No other accessories present on furrow spines other than the granular integument. Oral plates strongly convex or raised above plane of actinal intermediate plates.</p> <p>Although color in life was unavailable, patterns remained evident on the holotype. Plates on the central disk were dark brown/orange with pink in the center. The dark brown coloration from the disk was present interradially on the disk between the primary circlet to the interradial superomarginals. Abactinal coloration was dark pink to brown. Actinal intermediate region and color from lateral to actinolateral regions was lighter but similar to that of the abactinal surface. The areas around the mouth and along the adambulacral furrows were yellow to white.</p> <p> <b>Material examined. Holotype:</b> CASIZ 218854; Balut Island, Philippines, approximately 100 – 150 m.; Coll. taken with tangle net. 1 dry spec. R=3.7 r=1.1. <b>Paratypes:</b> CASIZ 218871; Balut Island, Philippines, approximately 100– 150 m.; Coll. taken with tangle net; 1 dry spec. R=5.1 r=1.2. CASIZ 219697 Balut Island, Philippines 200 m. Tangle net. R=4.5 r=1.3; CASIZ 219698 Balut Island, Philippines 200 m. Tangle net. R=4.5 r=1.0. 1 dry spec.</p>Published as part of <i>Mah, Christopher L., 2017, Overview of the Ferdina - like Goniasteridae (Echinodermata: Asteroidea) including a new subfamily, three new genera and fourteen new species, pp. 1-72 in Zootaxa 4271 (1)</i> on pages 42-44, DOI: 10.11646/zootaxa.4271.1.1, <a href="http://zenodo.org/record/583192">http://zenodo.org/record/583192</a>
A way to communicate: A new signage system for the Mah Meri Indigenous community
No full textToday, designers use a diverse range of alternative media to have a more efficient form of communication. This research is to investigate the potential of traditionally-inspired contemporary communication design to bridge cultural understandings between and among Malaysians of diverse racial and ethnic backgrounds. Specifically, I propose to design a new signage system in the Mah Meri indigenous community in Malaysia. This is in view that despite the development of the latest media alternatives in use today, the Mah Meri community still lags behind in terms of utilization of these new communication facilities. This project aims to improve social interactions between this community and visitors. The signage system that I propose will help outsiders to navigate in and around the Mah Meri settlements easier and faster because the system provides relevant information in a simple and easy to understand method. Without this signage system visitors will have difficulty in finding the right directions. This work also endeavours, through the notion of creating a new signage system to enrich the cultural identity of the Mah Meri community based on their beliefs in the elements of nature. This, in turn, will create a niche for the community to promote the uniqueness of their culture and identity to outsiders
The Soul of The Masks:: A Journey Through Mah Meri Indigenous Carvings
No full textAs part of their rituals, one of the native tribes of Malaysia, the Mah Meri, carve wooden masks and statues. These masks and statues are used in prayer rituals and ceremonies, and as a way of passing on the culture and heritage of the tribe. The carving of these artefacts was studied to learn about the Mah Meri way of life. With the help of photogrammetry, we digitised the Mah Meri masks and statues and wrote down the stories behind each one. These folktales say a lot about how the Mah Meri treat nature and how much they value it. From this data set, we wanted to see how augmented reality, installations and transmedia storytelling could be used to disseminate and preserve Mah Meri culture and history. We tried to bring the stories that were told to us back to life in a visual format, using the screens on our everyday devices. We turned the oral stories into digital sketches, which were then animated and displayed in an installation. Then, those narratives were changed so that the Mah Meri’s stories can be used in augmented reality story books. We want to show and share this multimedia representation of their folklore with the help of the digital container we have placed them in. The initial aim of the research is to immerse the wider public in the culture and heritage of Mah Meri. In disseminating this “research–creation,” we also want to see what this multimedia output could give back to the Mah Meri community and help them keep their communal knowledge alive and pass it on to the next generation
Âşık Mah Turna'nın hayatı, edebi kişiliği ve şiirleri
No full textÂşık Mah Turna'nın Hayatı, Edebi Kişiliği ve Şiirleri? adlı bu çalışma bir giriş ve 3 bölümden oluşturuldu. Çalışmanın giriş bölümünde, Âşık Mah Turna'nın âşıklık geleneğindeki yerinin tespitini kolaylaştırmak amacıyla önce ?Türk halk şiiri ve âşıklık geleneği? ardından da ?Alevi-Bektaşi şiiri ve âşıklık geleneğindeki yeri? hakkında önemli bilgiler verildi. 1. bölümde; Mah Turna'nın hayatı, âşıklığa başlaması, gezip gördüğü yerler ve karşılaştığı âşıklar hakkında tespitlerde bulunuldu. Yine bu bölümde edebi kişiliği başlığı adı altında şiirlerin iç ve dış yapısı değerlendirilerek özellikle onunla benzerlik gösteren saz şairleri ve âşıkların şiirleriyle karşılaştırma yoluna gidilip yorumlara yer verildi. 2. bölümde; şiirlerde geçen halk edebiyatı motifleri ve dini-tasavvufi unsurlar tespit edilerek incelendi. Halk edebiyatı motifleri başlığı altında şiirlerde geçen halk hikâyesi kahramanları, bade içme ve rüya motifi, formel sayılar, kalıp sözler ve hayvanlar ayrıntılı bir biçimde Mah Turna'nın dörtlüklerinde geçen kullanımlarıyla örneklenerek anlatıldı. Alevi-Bektaşi geleneğinden yetişen ve bu geleneğin izlerini şiirlerinde büyük ölçüde taşıyan Mah Turna'nın şiirlerindeki dini-tasavvufi unsurlar tespit edilirken Alevi-Bektaşi inancında yer alan özel adlar ve kavramlar ele alındı. 3. bölümde; Âşık Mah Turna'nın bugüne kadar yazmış olduğu 317 şiirine yer verildi. Bu şiirler, hece ölçüsüne göre sıralanırken 1 ve 2. bölümde yapılan incelemelerde gösterilen örnek dizelerin kolay bulunabilmesi için numaralandırma yapılarak çalışmada istatistiksel bir yöntem kullanıldı. Çalışmanın sonunda ise Türk edebiyatına bilimsel katkılarını ifade eden bir sonuç bölümü ile kaynakça ve dizine yer verildi. Anahtar Sözcükler: Âşık Mah Turna, Motif, Alevi-Bektaşi Geleneği, Âşıklık Geleneği.This study that is named ?Âşık Mah Turna?s Life, her Literal Personality and Poems? was consisted of an introduction part and three other parts as well. In the introduction part of the study; firstly some information on ? Turkish folk poem and âşık tradition? and some other information on ?Alevi-Bektaşi poem and its place in the âşık tradition? was given in order to facilitate the determination of Âşık Mah Turna?s place in the âşık tradition . In the first part; Mah Turna?s life, her starting point of âşıklık (minstrelsy), the places that she visited and the saz poets (poet-singers) that she met were determined. Furthermore, under the title of her literary personality, some comments were included by assessing her poems? internal and external structure. In addition to this her saz (which is a Turkish stringed instrument) poems and other Turkish saz poets? (poet-singers?) poems that were looking alike with her style, were compared and some other comments were given on the results of this comparision. In the second part; the themes of folk literature that take part in the poems and religious-mystical elements were determined and analyzed. Under the title of the themes of folk literature, folk tale heroes, bade and dream motifs, formal numbers, formulaic expressions and animals which take part in poems were illustrated and explained in a detailed way. Also, these themes were given illustratively on the basis of their usage in Mah Turna?s poems. The religious-mystical elements in the poems of Mah Turna, who grew up in the Alevi-Bektaşi tradition and reflected samples of this tradition in her poems, were adjusted and proper names, notions in Alevi-Bektaşi belief were examined. In the third part; 317 poems which have been written by Âşık Mah Turna during her lifetime were included. These poems were arranged according to the syllabic meter, the example lines of poems which were given in the first and second part of the study were enumerated. In order to facilitate finding of these example lines of poems a statical technique was used. At the end of the study, in the conclusion part her scientific contribution to Turkish literature, bibliography and index were included. Key Words: Âşık Mah Turna, Motif, Alevi-Bektaşi Tradition, Âşık Tradition
Finely Modulated LDPE/PS Blends via Synergistic Compatibilization with SEBS-g-MAH and OMMT
No full textMelt blending is an effective way to prepare new composite materials, but most polymers are incompatible. In order to reduce the interfacial tension and obtain fine and stable morphology with internal symmetric micro-textures, suitable compatibilizers should be added to the blend. The two immiscible polymers, low-density polyethylene (LDPE) and polystyrene (PS), were compatibilized by styrene/ethylene/butylene/styrene block copolymers grafted with maleic anhydride (SEBS-g-MAH) and organomontmorillonite (OMMT). The scanning electron microscope results indicated that the size of the PS phase decreased with increasing the content of SEBS-g-MAH. By introducing OMMT into LDPE/PS/SEBS-g-MAH composites, the compatibility of composites was further improved. The rheological analysis and Cole–Cole plot analysis indicated that the addition of SEBS-g-MAH and OMMT increased the interaction between the two phases. The tensile strength, elongation at break, and impact strength of the LDPE/PS/SEBS-g-MAH (70/30/7, wt%) composite increased by 64%, 255%, and 380%, respectively, compared with the LDPE/PS (70/30, wt%) composite. A small amount of OMMT could synergistically compatibilize the LDPE/PS composite with SEBS-g-MAH. After adding 0.3% OMMT into the LDPE/PS/SEBS-g-MAH system, the tensile strength, elongation at break, and impact strength of the composite were further increased to 18.57 MPa, 71.87%, and 33.28 kJ/m2, respectively
- …
