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AN UNUSUAL CRYSTALLIZATION PEAK OF POLY(VINYL CHLORIDE)

机译：聚氯乙烯的不寻常结晶峰

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摘要

Owing to an efficient quenching process that ensure r-poly(vinyl chloride) to be amorphous enough, crystallization of rPVC at lower temperatures has been found in samples with various processing histories. Through a modified Avrami analysis, kinetics of the isothermal crystallization at these low temperatures was studied, proving that the crystal growth in the studied temperature range was controlled by segment mobility, which should follow a WLF-type relationship. Such a mechanism is unusual compared to ordinary growth controlled by chain reptation. Also discussed were implications of the results to further crystallization study of PVC and to that of polymers in general. The treatment distinguished itself in that it can give out both spacial growth exponent and dependency of the dimension on time. (C) 1997 John Wiley & Sons, Inc. [References: 25]
机译：由于有效的淬火过程可确保r-聚氯乙烯足够无定形，因此在具有各种加工历史的样品中发现了rPVC在较低温度下的结晶。通过改进的Avrami分析，研究了在这些低温下等温结晶的动力学，证明了在所研究温度范围内的晶体生长受段迁移率控制，该段迁移率应遵循WLF型关系。与通过链复制控制的普通增长相比，这种机制是不寻常的。还讨论了结果对PVC和一般聚合物的进一步结晶研究的意义。这种处理方法的独特之处在于它既可以给出空间增长指数，也可以给出维数对时间的依赖性。 （C）1997 John Wiley＆Sons，Inc. [参考：25]

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