Research on the Influence of Molecular Chemical Compositions on Physical Properties of Ethylene-Vinyl Acetate Copolymer Emulsions

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2025-05-29 DOI:10.1002/pol.20250416

Haiyang Yuan, Naihong Ding, Jinhua He, Shaolin Ge, Xiaomeng Peng, Xiaofeng Yue, Maria Ghaffar, Guangming Liu, Zan Hua, Jiang Wu

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Abstract

Ethylene-vinyl acetate copolymer (EVA) emulsions are used in a wide range of industrial applications due to their excellent adhesive properties and environmental compatibility. The properties of EVA latex films or EVA emulsions vary greatly depending on the relative proportions of the non-polar ethylene and polar vinyl acetate components. However, in industrial applications, the importance of the molecular chemical composition of the EVA in the emulsions is often neglected. In this work, the relationship between molecular structure and properties of three industrially produced EVA emulsions is systematically investigated. The results show that the three EVA emulsions have similar number-average molecular mass (M _n), molecular weight distribution (Đ), and hydrodynamic diameter (D _h). Interestingly, we observe significant variations in the content of ethylene (E) and vinyl acetate (VAc). These variations result in significant differences in the thermal and mechanical properties of EVA latex films, as well as in the surface wettability of emulsions on substrates such as paper and stainless steel. This study provides a practical basis for selecting appropriate EVA emulsions in industrial applications.

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分子化学组成对乙烯-醋酸乙烯共聚物乳液物理性能影响的研究

乙烯-醋酸乙烯共聚物（EVA）乳液由于其优异的粘合性能和环境相容性而广泛用于工业应用。根据非极性乙烯和极性醋酸乙烯组分的相对比例，EVA乳胶膜或EVA乳液的性能变化很大。然而，在工业应用中，EVA在乳液中的分子化学组成的重要性往往被忽视。本文系统地研究了三种工业生产的EVA乳液的分子结构与性能之间的关系。结果表明，三种EVA乳剂的数平均分子质量（mn）、分子量分布（Đ）和水动力直径（dh）相似。有趣的是，我们观察到乙烯(E)和醋酸乙烯（VAc）含量的显著变化。这些变化导致EVA乳胶膜的热学和机械性能的显著差异，以及在纸和不锈钢等基材上乳液的表面润湿性。本研究为工业应用中选择合适的EVA乳剂提供了实践依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.