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Effect of Diamine and Triamines Crosslinkers on the Adhesive Properties of Soybean Oil-Based Non-Isocyanate Polyurethane
No full textNowadays, polyurethanes (PUs) play a major role in the polymer industry and are more and more popular due to their advantages and unique mechanical and chemical properties in different applications like foams, paint, coatings, elastomers, and adhesives, Bio-based sources have recently gained attention as sustainable alternatives to conventional petroleum-based material. Due to growing environmental concerns and the excessive use of petroleum-based products, this study explores non-isocyanate polyurethanes (NIPUs) as sustainable, low-toxicity alternatives to traditional PUs. To achieve this, as a starting material, soybean oil (SBO) was used, and it was converted into epoxidized soybean oil (ESBO). ESBO was then converted into CSBO using a Parr autoclave reactor in the presence of tetrabutylammonium bromide (TBAB). Then synthesized CSBO was characterized using physicochemical experiments, e.g. FT-IR, Oxirane oxygen percentage (%EOC content), viscosity analysis, gel permeation chromatography (GPC), and also the 1H NMR spectra further verified the formation of CSBO, Following the successful synthesis of CSBO, we used solvent-free and catalyst-free methods to synthesize NIPU. For that, we used two different diamines, namely Isophorone diamine (IPDI) and Meta-xylylene diamine (m-XDA), or one triamine, e.g. Tris(2-aminoethyl)amine (TAA). The NIPU adhesive specimens containing IPDA and m-XDA as curing agents exhibit lap shear strength of 1.1 MPa and 4.97 MPa respectively on the wood coupon. However, TAA containing adhesive sample shows excellent shear strength of 7.62 MPa on stainless-steel metal coupon under the optimized condition. The thermal transition of all fabricated adhesive samples was investigated by DSC analysis which shows higher glass transition temperature (Tg) of 35.12 oC and 34.58 oC for CSBO_IPDA (1:4) and CSBO_TAA (1:2.5) respectively compared to CSBO_m-XDA (1:3.5) specimen (Tg 16.33C) indicating higher cross-linking in the polymer network
World War II and American Families
No full textWhen people think of the home front during World War II, they likely think of it in terms of how society mobilized to support the war effort through political, military, and economic means. This is because up until the 1970s, historians confined their research to these perspectives which has in turn limited studies of social and cultural aspects on the home front such as wartime family dynamics and the myths that plague them. This paper intends to examine the way the history of the home front has changed over time. For years, historians have pointed to the absence of fathers and husbands as the cause for the degradation of family and family dynamics, suggesting that once they had returned home, families returned to normal and embodied the happy, golden nuclear family romanticized in many forms of media. However, the emergence of women and family historians in the 1970s challenges this traditional view with the inclusion of female and children\u27s perspectives which convey that experiences greatly varied family to family
Innovation and Perspective in Fantasy; Dissecting Six of Crows
No full textHerein shall be found a grammatical analysis of the prose within the New York Times best-selling YA novel from Leigh Bardugo, Six of Crows. It is presumed that by some facet of this analysis, the component that allowed her to succeed in an extremely saturated market may be discerned. Forty-six sentences, chosen at random, from the work are arranged and displayed among charts and figures to allow for effective analysis of the prose. Word choice, active versus passive voice, and average sentence length will be taken into account. In order to ensure fair representation, the data was taken from each tenth page randomly, such that sentences from the work\u27s beginning, middle, and end may be presented with equal representation. Findings indicate that most sentences are of moderate length, with two or three clauses. Many are only one clause, but some stretch out to the lofty heights of five or six. Most sentences found to be in the active voice, but a few are worded passively. This is consistent with most fiction. Given that the prose itself is unexceptional, it is the opinion of this writer that whatever produced Bardugo\u27s success lies outside the structure of individual sentences
COTTONSEED POLYOL-BASED COMPOSITE EVALUATED WITH INORGANIC FILLERS
Get PDFComposites are extensively utilized as raw materials in an industry. In this study, we synthesized polymer composites, cottonseed oil polyol-based composites, incorporating inorganic fillers. This synthesis process involves the epoxidation of cottonseed oil followed by ring opening. Various characteristics of the polyol, such as the presence and quantity of hydroxyl groups (-OH), iodine value, and viscosity, and Fourier transform infrared spectroscopy (FTIR) was determined. The composite samples were prepared by mixing different fillers (SiO2, TiO2, and Al2O3). These composite formulations underwent three-week processing period, with each filler being incorporated at room temperature. Compression testing was employed to examine the impacts of these composites on mechanical characteristics, and thermogravimetric analysis (TGA) clarified weight loss and changes in physical state at different temperatures. Hardness testing evaluated the strength and flexibility of materials. The inclusion of cottonseed-polyol in these composites holds promised for industrial applications. This research endeavors to contribute to the development of safer materials suitable for various industrial applications
IMPROVING CAREGIVER EDUCATION FOR THE MANAGEMENT OF THE FEBRILE PEDIATRIC PATIENT
Get PDFIMPROVING CAREGIVER EDUCATION FOR THE MANAGEMENT OF THE FEBRILE PEDIATRIC PATIENT
An Abstract of the Scholarly Project by
Scarlett Tomasi, RN
Fever is the most common reason for children under the age of 15 to be brought to the emergency department by their parents or caregiver (U.S. Department of Health and Human Services et al., 2018). Fever is often diagnosed as benign and can be treated symptomatically in the home with proper education. The purpose of this project was to provide education to caregivers of the pediatric population focusing on fever management. This study was implemented via social media and Qualtrics utilizing a baseline questionnaire, pretest, and an educational offering regarding fever management and perceptions surrounding fever. A posttest was given after the educational offering to measure the participants knowledge proficiency. The final sample size after exclusions was 58 caregivers of children between the ages of 6 months and 12 years of age. The data was analyzed with SPSS and a paired sample t-test. The study was found to be statistically significant with an average improvement of knowledge of 16.207% as evidenced by the improved posttest scores. Results of the data have the potential to impact and influence future programs in the healthcare community, as well as influence local healthcare providers to improve bedside fever management education during routine and acute healthcare visits
DEVELOPMENT OF NON-PRECIOUS IRON-COBALT ALLOY CATALYST FOR ELECTROCATALYTIC REACTION
Get PDFThe development of a FeCo alloy catalyst with tunable Fe/Co ratios is examined to improve electrocatalytic performance in reactions like the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and oxygen reduction reaction (ORR). Many energy conversion devices, such as fuel cells, metal-air batteries, and water-splitting systems, depend on these interactions to function. These technologies have huge potential to meet the increasing need for hydrogen production and renewable energy sources worldwide, which are critical to attaining a sustainable energy future. When compared with noble metal-based catalysts, the FeCo alloy catalyst shows much higher catalytic activity, according to previous studies. Hydrothermal and pyrolysis techniques were used to synthesis alloy and characterized through diffraction and microscopic studies to confirm the formation of alloy and nitrogen-doped carbon structures. The alloy in the stoichiometry Fe0.9Co0.1-CNT performed exceptionally well in the electrocatalytic tests, low overpotentials of 247 mV and 71 mV for OER and HER, respectively at a current density of 10 mA/cm², and E1/2 of 0.87 V vs. RHE for ORR process was notable. Meanwhile, the catalysts possessing moderate Fe concentration showed an improved electrocatalytic activity for all three reactions, whereas excessive Fe leads to a decrease in activity, particularly in HER and OER reactions. FeCo alloy with a precise concentration of Fe and Co in the NC/CNT structure improves the electrical characteristics of the catalyst and raises the density of active sites. As a result, ORR, OER, and HER exhibit increased reaction kinetics and faster electron transfer. The results indicate that the combination of NC/CNT materials with a balanced FeCo combination offers a high-performance, low-cost substitute for catalysts based on precious metals, with a significant advantage for the development of sustainable energy systems
Statues
No full textBlack and white photo of two people in Porter Library, the man appears to be showing the woman the small statues and busts on top of the shelves.https://digitalcommons.pittstate.edu/porterbuilding/1009/thumbnail.jp
Stage Coach Daisy
No full textBlack and white photo of Norman Tanis and student Julie Vineyard. Vineyard sits inside a stage coach while Tanis holds a ribbon that is tied to the top of it. Sign on the coach reads, This stage coach (Daisy) is one of the coaches used in 1857. The stage line was in operation from St. Joseph to Kansas Cit. to Ft. Leavenworth to Ft. Scott to Girard to Chetopa to Ft. Smith to Ft. Gibson. Stage coach J.T. Moorehttps://digitalcommons.pittstate.edu/porterbuilding/1032/thumbnail.jp
Norman Tanis
No full textBlack and white photo of Norman Tanis holding a book in front of the stacks.https://digitalcommons.pittstate.edu/porterbuilding/1042/thumbnail.jp
Porter Library
No full textBlack and white photo of the front doors of Porter Library.https://digitalcommons.pittstate.edu/porterbuilding/1074/thumbnail.jp