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首页> 外文期刊>Journal of Applied Polymer Science >The Preparation and Analysis of Chlorinated Ethylene Vinyl Acetate Copolymer as Coating Film in Gas-Solid Phase
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The Preparation and Analysis of Chlorinated Ethylene Vinyl Acetate Copolymer as Coating Film in Gas-Solid Phase

机译：气相固溶氯化乙烯醋酸乙烯酯共聚物涂膜的制备与分析

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摘要

In this article, the feasibility of preparing chlorinated ethylene vinyl acetate copolymer (CEVA) in gas–solid phase is investigated. Furthermore, the structure of the chlorination product and its performance as a coating material are also analyzed. Both the molecular structure and crystallinity of the product are well studied with various characterization methods, including ~1H-NMR, Fourier transform infrared, gel permeation chromatography, differential scanning calorimeter, and so forth. The results show that the chlorination of EVA in gas–solid phase is feasible and the chlorine content of CEVA can be made over 60%. It is also found that when the chlorine content is low, chlorination can easily occur in ethylene section but rarely happens in vinyl acetate section. Nevertheless, when the chlorine content of CEVA rises over 35%, ACH in the vinyl acetate section is also found chlorinated. The removal of hydrogen chloride is induced during chlorination, producing double bonds in the main chain. Besides, the trace of ACCl_2 structure can also be found in the chain of CEVA. After chlorination, the crystallization will change and is negatively correlated with chlorine content. As the film forming material for coating, CEVA has its best performance with 50% chlorine content.
机译：在本文中，研究了制备气相固相氯化乙烯-乙酸乙烯酯共聚物（CEVA）的可行性。此外，还分析了氯化产物的结构及其作为涂料的性能。产品的分子结构和结晶度已通过各种表征方法进行了深入研究，包括〜1 H-NMR，傅立叶变换红外光谱，凝胶渗透色谱法，差示扫描量热仪等。结果表明，气固相中EVA氯化是可行的，CEVA的氯含量可以达到60％以上。还发现当氯含量低时，氯化容易在乙烯部分发生，而很少发生在乙酸乙烯酯部分。但是，当CEVA的氯含量超过35％时，醋酸乙烯酯部分的ACH也被氯化。在氯化过程中诱导除去氯化氢，在主链中产生双键。此外，在CEVA的链中也可以找到ACCl_2结构的痕迹。氯化后，结晶将发生变化，并且与氯含量呈负相关。作为涂料的成膜材料，CEVA的最佳性能是氯含量为50％。

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