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首页> 外文期刊>Journal of Applied Polymer Science >Miscibility and crystallization behavior of poly(ethylene-co-vinylalcohol)/ poly(maleic anhydride-alt-ethylene) blend
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Miscibility and crystallization behavior of poly(ethylene-co-vinylalcohol)/ poly(maleic anhydride-alt-ethylene) blend

机译：聚乙烯-共-乙烯醇/聚马来酸酐-alt-乙烯共混物的混溶性和结晶行为

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摘要

The miscibility of poly(vinylalcohol-co-ethylene) (PEVA) with poly(ethylene-alt-maleic anhydride) (PEMAH) blends was investigated over a wide range of compositions by viscosimetry and DSC analyses using Krigbaum-Wall and Kwei approaches. The results revealed that the blends were completely miscible in all proportions due to the specific interactions between the hydroxyl groups of PEVA and the carbonyl groups of PEMAH. From Nishi equation, the interaction parameter of Flory was found to be -0.89. The nonisothermal crystallization behavior and kinetics of this system were also investigated and compared with those of the pure PEVA. There were strong dependencies of the degree of crystallinity (X _T), peak crystallization temperature (T _p), half time of crystallization (t _(1/2)), and Ozawa exponent (m) on PEMAH content and cooling rate. The crystallization activation energy (E _c) that was calculated from Kissinger model increased with increasing PEMAH composition in the blend.
机译：使用Krigbaum-Wall和Kwei方法，通过粘度测定和DSC分析，研究了聚乙烯醇-乙烯-乙烯（PEVA）与聚乙烯-马来酸酐（PEMAH）共混物的混溶性。结果表明，由于PEVA的羟基与PEMAH的羰基之间存在特定的相互作用，因此这些混合物在所有比例下都是完全可混溶的。根据Nishi方程，发现Flory的相互作用参数为-0.89。还研究了该系统的非等温结晶行为和动力学，并将其与纯PEVA的非等温结晶行为和动力学进行了比较。结晶度（X _T），峰值结晶温度（T _p），结晶时间的一半（t _（1/2））和小泽指数（m）与PEMAH含量和冷却速率密切相关。由基辛格模型计算得出的结晶活化能（E _c）随着共混物中PEMAH组成的增加而增加。

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