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首页> 外文期刊>Journal of Applied Polymer Science >Effect of branching on the crystallization kinetics of poly(ethylene terephthalate)
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Effect of branching on the crystallization kinetics of poly(ethylene terephthalate)

机译：支化对聚对苯二甲酸乙二醇酯结晶动力学的影响

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摘要

The effect of branching on the crystallization behavior of poly(ethylene terephthalate) has been examined by nonisothermal crystallization studies, using DSC. It was found that branching causes a significant change in the crystallization behavior, in that the Avrami exponent n lies between 1 and 2, suggesting a rodlike growth process compared to a spherulitic one observed in the case of PET. In addition, the effect of molecular kinks and linear disruptions were also examined; in both these cases, however, the same spherulitic growth, as seen in the case of PET, is observed. Further, the presence of branching, kinks and linear disruptions, in small concentrations, appears to enhance the crystallization process, possibly, by acting to facilitate nucleation. At higher concentrations of such defects, however, the crystallization process is slowed down and the overall crystallinity of the PET copolymers is reduced.
机译：使用DSC通过非等温结晶研究已经研究了支化对聚对苯二甲酸乙二醇酯结晶行为的影响。发现支化导致结晶行为的显着变化，因为Avrami指数n在1和2之间，这表明与在PET情况下观察到的球状相比，棒状的生长过程。另外，还研究了分子扭结和线性破坏的影响。然而，在这两种情况下，都观察到了与PET相同的球状生长。此外，低浓度的支化，扭结和线性破坏的出现似乎可以通过促进成核作用来增强结晶过程。然而，在这些缺陷的浓度较高时，结晶过程变慢并且PET共聚物的总结晶度降低。

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