聚酰胺66的横结晶与球晶结晶的实验研究

IF 1.9 Q2 CRYSTALLOGRAPHY

Polymer Crystallization Pub Date : 2019-02-01 DOI:10.1002/PCR2.10028

L. Freire, C. Combeaud, G. Monge, N. Billon, J. Haudin

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引用次数: 3

摘要

用光学显微镜和差示扫描量热法(DSC)研究了3种聚酰胺66的结晶过程。用Oza-wa方程分析了非等温结晶动力学。两种聚合物具有密切的结晶行为，结晶以球晶为主。第三种物质的摩尔质量最高，受强烈的跨晶度影响，扰乱了结晶动力学(DSC曲线上有肩，Avrami指数低)。对于这种聚合物，基于对横结度的详细分析的原始方法已被应用于测量晶体生长速率和确定“固有”结晶动力学，即不受横结度污染

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Transcrystallinity versus spherulitic crystallization in polyamide 66: An experimental study

The crystallization of 3 polyamides 66 has been studied by optical microscopy and differential scanning calorimetry (DSC). Nonisothermal crystallization kinetics has been analyzed using Oza-wa's equation. Two polymers have close behaviors with a crystallization mainly spherulitic. The third one, which has the highest molar mass, is subject to intense transcrystallinity, which disturbs the crystallization kinetics (shoulder on the DSC curves and low Avrami exponent). For this polymer, original methods based on a detailed analysis of transcrystallinity have been applied to measure crystal growth rate and to determine the "intrinsic" crystallization kinetics, that is, not polluted by transcrystallinity

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来源期刊

Polymer Crystallization Materials Science-Materials Science (miscellaneous)

CiteScore

4.70

自引率

0.00%

发文量