1,720,992 research outputs found
Evidence of aggregation in dilute solution of amphoteric poly(amido-amine)s by size exclusion chromatography
No full textEvidence of aggregation of amphoteric linear poly(amido-amine)s (PAAs) was proved using a multi-angle laser light scattering detector on-line to a size exclusion chromatography (SEC) system. As a rule the PAAs chemical structure, with the presence of charged groups that are both anionic and cationic, easily generates aggregation and non-steric fractionation. A non-amphoteric, non-aggregate PAAs polymer with an elution pattern close to ideal SEC was also obtained and characterized for comparison. The influence of PAAs synthesis conditions on the extent of aggregation was also studied. Copyrigh
Non-Covalent associations of Cyclomaltooligosaccarides (Cyclodextrins) with trans-β-Carotene in Water: Evidence for the Formation of Large Aggregates by Light Scattering and NMR
No full textA Study on the N-Allylation Reaction of Aromatic Polyamides. 1. Poly(p-phenylene terephthalamide)
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Non-covalent associations of cyclomaltooligosaccharides (cyclodextrins) with carotenoid in water. A study of the alfa- and beta-cyclodextrin / fi,fi-carotene (Lycopene) systems by light-scattering, ionspray ionization and tandem mass spectrometry
No full textBlock-copolymers containing poly(2,6-dimethyl-1,4-phenylene oxide) and polycarbonate of bisphenol A: synthesis and molecular characterization
No full textSynthesis and characterization of a hyperbranched aramid originated from the direct polyamidation of 5-(4-Aminobenzoylamino)isophthalic acid
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Proprietà morfologiche, ottiche e diffusionali di film per imballaggio alimentare ottenuti da miscele di polietileni a bassa densità con copolimeri etilenecicloolefine
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