Topic
Vinyl acetate
About: Vinyl acetate is a research topic. Over the lifetime, 15970 publications have been published within this topic receiving 162142 citations. The topic is also known as: Ethenyl acetate & Ethenyl ethanoate.
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53 citations
TL;DR: In this article, a thermal analysis revealed that crystallization of poly(vinylidene fluoride) (PVF2) can be impeded to a large degree by fast cooling from the melt of polyblends containing less than 55% PVF2.
53 citations
TL;DR: In this article, the in situ compatibilization of poly(ethylene terephthalate) (PET) copolymer (PETG) with ethylene vinyl acetate (EVA) via catalysed transesterification reactions was examined through rheological, morphological and mechanical studies.
53 citations
TL;DR: Free radical copolymerization of water-soluble N-vinylamides such as NVA and N-vinylformamide with hydrophobic vinyl acetate (VAc) gave amphiphilic copolymers as mentioned in this paper.
Abstract: Free radical copolymerization of water-soluble N-vinylamides such as N-vinylacetamide (NVA) and N-vinylformamide (NVF) with hydrophobic vinyl acetate (VAc) gave amphiphilic copolymers. The monomer reactivity ratios were determined as r 1 = 5.8 and r 2 = 0.68 (M 1 = NVA, M 2 = VAc) and r 1 = 6.2 and r 2 = 0.37 (M 1 = NVF, M 2 = VAc), respectively. The growing radical of the terminals of N-vinylamides propagates more favorably for N-vinylamide monomers than for VAc monomer, resulting in the possible formation of blocky copolymers. It is found that aqueous solutions of these amphiphilic copymers exhibited a lower critical solution temperature (LCST), depending on their chemical composition, followed by coacervate formation above the LCST. Furthermore, thermosensitive hydrogels could be prepared by the free radical copolymerization of N-vinylamide and VAc in the presence of the crosslinker butylenebis(N-vinylacetamide) (Bis-NVA). The swelling ratios of these hydrogels decreased with an immediate increase in temperature from 20 to 80°C, and then reversibly increased with decreasing temperature. These hydrogels showed the same thermosensitive properties as linear copolymers of NVF and VAc.
53 citations
TL;DR: The thermal degradation in vacuo, up to 500°C, of a vinyl acetate-methacrylic acid (VA-MAA) copolymer having 65% alternating units, and of the corresponding homopolymers, has been studied by reflection absorption FTIR spectroscopy as discussed by the authors.
53 citations