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400 Newest Publications about the topic vinyl acetate

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First vinyl acetate mediated organocatalytic transesterification of Phenols: A step towards sustainability

26-Aug-2015 | Manoj Kumar; Sourav Bagchi; Anuj Sharma, New Journal of Chemistry, 2015

The present report outlines our efforts toward a simple yet elegant protocol for O-acylation of wide variety of phenols. This highly enabling and solventless method relies on vinyl acetate as innocuous acyl donor and DABCO as an organocatalyst. Operational simplicity, excellent yields, higher and ...

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Pullulan‐Based Polymer Surfactants for Vinyl Acetate Miniemulsion Polymerization: Kinetics and Colloidal Stability Investigations

19-Aug-2015 | Sabrina Belbekhouche, Luc Picton, Didier Le Cerf, Thierry Hamaide, Macromolecular Chemistry and Physics, 2015

Various pullulan‐b‐Jeffamine block copolymers (Jeffamine is a PEO‐b‐PPO copolymer (PEO = poly(ethylene oxide), PPO = poly(propylene oxide)) are used as surfactants for vinyl acetate miniemulsion polymerization. Their influence on the kinetics, average molecular weights and colloidal stability, ...

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Synthesis and Rheological Characterization of Poly(vinyl acetate-b-vinyl alcohol-b-vinyl acetate) Triblock Copolymer Hydrogels

30-Jul-2015 | Frank W. Speetjens, II; Mahesh K. Mahanthappa, Macromolecules, 2015

We report the synthesis and shear rheology of a series of hydrogels derived from poly(vinyl acetate-b-vinyl alcohol-b-vinyl acetate) (PVAc-b-PVOH-b-PVAc) triblock copolymers. Bidirectional, reversible-addition–fragmentation chain transfer free radical polymerizations of vinyl acetate (VAc) and ...

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Visible-Light-Induced Living Radical Polymerization (LRP) Mediated by (salen)Co(II)/TPO at Ambient Temperature

28-Jul-2015 | Yaguang Zhao; Shuailin Zhang; Zhenqiang Wu; Xu Liu; Xianyuan Zhao; Chi-How Peng; Xuefeng Fu, Macromolecules, 2015

Visible-light-induced living radical polymerization of acrylates (MA, nBA, tBA), acrylamides (DMA, AMO), and vinyl acetate (VAc) at ambient temperature mediated by (salen)Co(II)/TPO was described. Effects of light intensity, feeding ratio of monomer and equivalent of TPO for the polymerization of ...

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Assessment and Application of Density Functional Theory for the Prediction of Structure and Reactivity of Vanadium Complexes

24-Jul-2015 | Brendan J. H. Sheppard; Michael P. Shaver; Jason K. Pearson, Journal of Physical Chemistry A, 2015

We assess the performance of six density functionals, each paired with one of five basis sets (a total of 30 model chemistries) for the prediction of geometrical parameters in the coordination sphere of nine vanadium complexes (for a total of 270 structural analyses). We find that results are ...

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Evaluation of conversion during the synthesis of aluminum (III) methacrylate-based copolymers using Raman spectroscopy and multivariate curve resolution

20-Jul-2015 | Author(s): Gabriella R. Ferreira, Frederico L.F. Soares, Renato L. Carneiro, Alexandre P. Umpierre, Fabricio ..., Microchemical Journal, 2015

Publication date: November 2015 Source:Microchemical Journal, Volume 123 Author(s): Gabriella R. Ferreira, Frederico L.F. Soares, Renato L. Carneiro, Alexandre P. Umpierre, Fabricio Machado The present work addresses the use of Raman spectroscopy and multivariate curve ...

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Ethylene vinyl acetate copolymer nanocomposites based on (un)modified sepiolite: Flame retardancy, thermal, and mechanical properties

16-Jul-2015 | Hossein Cheraghi Bidsorkhi, Hossein Adelnia, Nafiseh Naderi, Nima Moazeni, Zurina Mohamad, Polymer Composites, 2015

Flame retardant ethylene‐vinyl acetate (EVA) nanocomposites were prepared by melt blending using unmodified and modified sepiolite. Modification process of sepiolite was carried out by using 3‐aminopropyltrimethoxysilane in water/ethanol medium. Thermal, mechanical, and flame retardancy ...

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Study on viscoelastic, crystallization, and mechanical properties of HDPE/EVA/Mg(OH)2 composites

14-Jul-2015 | Yonghong Ma, Fei Qi, Man Chen, Xiaolang Chen, Jun Qin, Mengqi Tang, Polymer Composites, 2015

In this article, elastomer‐toughened high density polyethylene/magnesium hydroxide (HDPE/MH) composites with various contents of ethylene vinyl acetate copolymer (EVA) are prepared in a twin‐screw extruder and then injection‐molded. The effect of EVA on the viscoelastic, crystallization, ...

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Supramolecularly Regulated Ligands for Asymmetric Hydroformylations and Hydrogenations

26-Jun-2015 | Anton Vidal‐Ferran, Ignasi Mon, Antonio Bauzá, Antonio Frontera, Laura Rovira, Chemistry - A European Journal, 2015

Abstract Herein we report the use of polyether binders as regulation agents (RAs) to enhance the enantioselectivity of rhodium‐catalyzed transformations. For reactions of diverse substrates mediated by rhodium complexes of the α,ω‐bisphosphite‐polyether ligands 1–5,a–d, the enantiomeric excess ...

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Semicontinuous Emulsion Copolymerization of Vinyl acetate and Butyl acrylate with Nonionic Surfactants (Triton X Series)

25-Jun-2015 | Gülsüm Karacetin, Ayfer Sarac, Macromolecular Symposia, 2015

Summary In this study, the copolymerization of vinyl acetate (VAc) and butyl acrylate (BuA) in water semicontinuous emulsions made with the nonionic surfactants, Triton Xs, was studied as a function number of ethylene oxide (EO, X) and their concentrations. The copolymerization of VAc and BuA ...

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