A new method to determine the Avrami exponent by dsc studies of non-isothermal crystallization from the molten state
A new method to determine the Avrami exponent by dsc studies of non-isothermal crystallization from the molten state
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DOI：
10.1016/s0032-3861(96)00552-6
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发表时间：
1997-02-01
期刊：
影响因子：
4.6
通讯作者：
Cavrot, JP
中科院分区：
文献类型：
--
作者：
Caze, C;Devaux, E;Cavrot, JP
本文报道的方法是一种简单的手段，通过它来确定Avrami指数，n，从熔融状态的半结晶聚合物冷却后。这种测定通常是一件苦差事，现在已经大大简化了，但仍然令人满意地可靠。它是基于测量，从实验结晶结晶曲线，峰的最大值和它的拐点为不同的冷却速率。结果进行了测试，对小泽理论，并发现，我们的方法是适合于一个轻微的填充或未填充的热塑性聚合物。然而，无论是我们的方法，也不小泽理论适用时，矩阵增强与有效的成核剂。(C)1997年爱思唯尔科学有限公司
The method reported in this paper is a simple means by which to determine the Avrami exponent, n, after cooling from the molten state of semi-crystalline polymers. This determination, often drudgery, has been significantly simplified, yet remains satisfactorily reliable. It is based on the measurement, from an experimental crystallization exotherm, of the peak maximum and its inflexion points for different cooling rates. Results were tested against the Ozawa theory, and it was found that our method was suitable for a slightly filled or unfilled thermoplastic polymer. However, neither our method nor the Ozawa theory apply when the matrix is reinforced with an efficient nucleating agent. (C) 1997 Elsevier Science Ltd.