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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TL;DR: In this paper, as-synthesized MCM-48 was modified via silylation with Cl−Si(CH3)3 to obtain a well-ordered long-range structure, a narrow distribution of nanosized pore diameters, a high mesoporous volume, a large specific surface area and a hydrophobic surface.
Abstract: As-synthesized MCM-48 was modified via silylation with Cl−Si(CH3)3. The resulting silylated MCM-48 possesses a well-ordered long-range structure, a narrow distribution of nanosized pore diameters, a high mesoporous volume, a large specific surface area, and, most significantly, a hydrophobic surface. A nanocomposite structure based on silylated MCM-48 and poly(vinyl acetate) (PVAc) has been prepared through both in situ polymerization and incorporation of preformed polymer. Characterization by FT-IR, XRD, and N2 adsorption−desorption techniques indicates the latter method is more effective than the in situ polymerization method. The composites obtained by addition of the PVAc/silylated MCM-48 particles to a PVAc matrix have significantly enhanced mechanical performance, including toughness and elasticity, when compared with PVAc itself or with composites derived from PVAc and pure silylated MCM-48 or precipitated silica.
51 citations
TL;DR: In this paper, a method to produce polyvinyl acetate lattices with high-solid content without losing the characteristics of the micro-emulsion-made particles is presented.
51 citations
TL;DR: In this article, the complex relative permittivity of poly(vinyl acetate) from 35 °C to 190 °C and polyvinyl chloride from 90°C to 150°C in the frequency range 10−2 −107 Hz and the pressure range 1−5000 bar were reported.
Abstract: Measurements of the complex relative permittivity of poly(vinyl acetate) from 35 °C to 190 °C and poly(vinyl chloride) from 90 °C to 150 °C in the frequency range 10−2 −107 Hz and the pressure range 1–5000 bar are reported. Details of the pressure generating system and of the dielectric equipment are described.
51 citations
TL;DR: In this article, a good agreement between the results of various methods for determination of compatibility was established for various methods involving dielectric and physico-mechanical properties and also thermal analysis.
51 citations
TL;DR: In this article, quasielastic neutron scattering in a temperature range from 50 to 300 K, below its glass transition temperature (Tg ≅ 315 K), has been investigated by using three different neutron spectrometers covering a wide dynamic range from 10-8 to 10-12 s.
Abstract: The methyl group dynamics in a glassy polymer, poly(vinyl acetate) (PVAc), has been investigated by quasielastic neutron scattering in a temperature range from 50 to 300 K, below its glass transition temperature (Tg ≅ 315 K). We have used three different neutron spectrometers covering a wide dynamic range from 10-8 to 10-12 s. The data have been analyzed in the framework of the rotation rate distribution model, which was previously introduced by us to interpret methyl group dynamics in glassy polymers. This framework has proved to be a better approximation than an alternative approach based on the Kohlrausch−Williams−Watts function, when a wide dynamical range is considered. The results obtained for PVAc have been compared with those corresponding to four other polymers: poly(vinyl methyl ether), poly(methyl methacrylate), polyisoprene, and poly(dimethylsiloxane), which have also been analyzed in the same theoretical framework. While the average activation energy barrier for methyl group rotation is dete...
51 citations