The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform

Eusebio Fontán - One of the best experts on this subject based on the ideXlab platform.

  • Aspects of the thermal oxidation of Ethylene Vinyl Acetate copolymer
    Polymer Degradation and Stability, 2000
    Co-Authors: Norman S. Allen, Michele Edge, Miguel Rodríguez, Christopher M. Liauw, Eusebio Fontán
    Abstract:

    The thermal oxidation of Ethylene-Vinyl Acetate copolymer [EVA-17 and 28% w/w VA (Vinyl Acetate) units] is examined by thermo-gravimetric and hydroperoxide analysis, Fourier transform infra-red (FTIR) fluorescence spectroscopy and yellowness index. Thermal analysis indicates the initial loss of acetic acid followed by oxidation and breakdown of the main chain. FTIR spectroscopic analysis of the oxidize EVA shows evidence for de-acetylation followed by the concurrent formation of hydroxyl/hydroperoxide species. The EVA degradation is therefore, different from that of PVC where in the latter case polyconjugated Vinyl groups are evident through conjugated absorption bands in the UV spectrum.

Charles A Wilkie - One of the best experts on this subject based on the ideXlab platform.

  • thermal degradation of Ethylene Vinyl Acetate coplymer nanocomposites
    Polymer, 2005
    Co-Authors: Marius C Costache, David D Jiang, Charles A Wilkie
    Abstract:

    Abstract The degradation pathway of Ethylene–Vinyl Acetate copolymers and their nanocomposites is investigated using TGA/FT-IR, TGA, GC–MS, cone calorimetry and UV techniques to determine if the presence of the clay has an effect on the degradation pathway. The first step of the degradation, the loss of acetic acid by chain stripping, has been shown to be accelerated by the presence of clay. In this work we show that clay does affect the degradation pathway and that the presence of hydroxyl groups on the edges of the clay could be the cause of the accelerated initial step. The products of the second step of the degradation are changed in quantity and some new products are produced, showing that the clay also has an effect on this step of the degradation pathway. A scheme is suggested to account for the role of the clay in the degradation.

Norman S. Allen - One of the best experts on this subject based on the ideXlab platform.

  • Aspects of the thermal oxidation of Ethylene Vinyl Acetate copolymer
    Polymer Degradation and Stability, 2000
    Co-Authors: Norman S. Allen, Michele Edge, Miguel Rodríguez, Christopher M. Liauw, Eusebio Fontán
    Abstract:

    The thermal oxidation of Ethylene-Vinyl Acetate copolymer [EVA-17 and 28% w/w VA (Vinyl Acetate) units] is examined by thermo-gravimetric and hydroperoxide analysis, Fourier transform infra-red (FTIR) fluorescence spectroscopy and yellowness index. Thermal analysis indicates the initial loss of acetic acid followed by oxidation and breakdown of the main chain. FTIR spectroscopic analysis of the oxidize EVA shows evidence for de-acetylation followed by the concurrent formation of hydroxyl/hydroperoxide species. The EVA degradation is therefore, different from that of PVC where in the latter case polyconjugated Vinyl groups are evident through conjugated absorption bands in the UV spectrum.

M. Van Duin - One of the best experts on this subject based on the ideXlab platform.

  • Thermoreversible Cross-Linking of Furan-Containing Ethylene/Vinyl Acetate Rubber with Bismaleimide
    Polymers, 2017
    Co-Authors: Lorenzo Massimo Polgar, Erik Hagting, Wouter Jan Koek, Francesco Picchioni, M. Van Duin
    Abstract:

    © 2017 by the authors. Licensee MDPI, Basel, Switzerland.A proof of principle for the use of Diels-Alder (DA) chemistry as a thermoreversible cross-linking tool for Ethylene-Vinyl Acetate (EVA) rubber is demonstrated using two differently prepared amorphous furan-functionalized EVA rubbers. The first is an EVFM terpolymer of Ethylene, Vinyl Acetate, and furfuryl methacrylate. The second is an EVA-g-furan product, resulting from the reaction of maleated EVA with furfurylamine. Both furan-containing EVA rubbers have been cross-linked with bismaleimide (BM) via a DA coupling reaction to yield final products with similar cross-link density. The BM cross-linked EVFM terpolymer products display rubber properties similar to the ones of peroxide-cured EVA rubbers with similar cross-link densities, whereas the rubber properties of the BM cross-linked EVA-g-furan correspond to those of a rubber with a higher cross-link density. The preparation of the EVA-g-furan was up-scaled to a small internal mixer, which also allowed compounding with carbon black and mineral oil in the same step. Compounding with carbon black results in reinforcement of the EVA rubber (i.e., enhanced strength), and does not interfere with the reprocessing via the retro DA reaction.

Marius C Costache - One of the best experts on this subject based on the ideXlab platform.

  • thermal degradation of Ethylene Vinyl Acetate coplymer nanocomposites
    Polymer, 2005
    Co-Authors: Marius C Costache, David D Jiang, Charles A Wilkie
    Abstract:

    Abstract The degradation pathway of Ethylene–Vinyl Acetate copolymers and their nanocomposites is investigated using TGA/FT-IR, TGA, GC–MS, cone calorimetry and UV techniques to determine if the presence of the clay has an effect on the degradation pathway. The first step of the degradation, the loss of acetic acid by chain stripping, has been shown to be accelerated by the presence of clay. In this work we show that clay does affect the degradation pathway and that the presence of hydroxyl groups on the edges of the clay could be the cause of the accelerated initial step. The products of the second step of the degradation are changed in quantity and some new products are produced, showing that the clay also has an effect on this step of the degradation pathway. A scheme is suggested to account for the role of the clay in the degradation.