Email this article Microstructure and Thermal and Rheological Properties of Low-Molecular-Mass Ethylene–Vinyl Acetate Copolymer
- Authors: Morontsev A.A.1, Karpov G.O.1, Il'in S.O.1, Dement'ev K.I.1, Bermeshev M.V.1
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Affiliations:
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
- Issue: No 1 (2023)
- Pages: 84-94
- Section: Articles
- URL: https://journals.rcsi.science/0044-4618/article/view/141703
- DOI: https://doi.org/10.31857/S0044461823010103
- EDN: https://elibrary.ru/HVEKKB
- ID: 141703
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Abstract
The microstructure of low-molecular-mass ethylene–vinyl acetate copolymers was studied by 1Н and 13С NMR spectroscopy. The vinyl acetate mole fraction, chain branching, and mean lengths of ethylene and vinyl acetate blocks were determined. The thermal properties of ethylene–vinyl acetate copolymers were studied by differential scanning calorimetry and thermogravimetric analysis, and the crystalline characteristics, by X-ray diffraction analysis. The degree of crystallinity of the copolymer decreases with an increase in the fraction of the polar comonomer. Rheological studies show that ethylene–vinyl acetate copolymers at room temperature tend to microphase segregation and form a microphase structural network.
About the authors
A. A. Morontsev
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
Email: acjournal.nauka.nw@yandex.ru
G. O. Karpov
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
Email: acjournal.nauka.nw@yandex.ru
S. O. Il'in
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
Email: acjournal.nauka.nw@yandex.ru
K. I. Dement'ev
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
Email: acjournal.nauka.nw@yandex.ru
M. V. Bermeshev
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
Author for correspondence.
Email: acjournal.nauka.nw@yandex.ru
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