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粉煤灰/聚丙烯复合材料的非等温结晶动力学行为
          
Non-isothermal Crystallization Kinetics Behavior of Fly Ash/Polypropylene Composites

摘    要
采用差示扫描量热仪研究了粉煤灰/聚丙烯(FA/PP)复合材料的非等温结晶行为, 并探讨了基于Jeziorny法和莫志深法的结晶动力学, 最后利用Flynn-Wall-Ozawa方程计算了纯PP和复合材料的结晶活化能。结果表明: 在PP中加入FA后, 复合材料的结晶起始温度To、结晶峰值温度Tp、Avrami指数n、半结晶时间t1/2和冷却速率F(T)均增大, 结晶速率常数Zc降低; 当FA的质量分数为15%时, 复合材料的t1/2、活化能以及F(T)最小, Zc最大; FA/PP复合材料的结晶活化能均高于纯PP的。
标    签 粉煤灰   聚丙烯   非等温结晶   动力学   fly ash   polypropylene   non-isothermal crystallization   kinetics  
 
Abstract
Non-isothermal crystallization kinetics behavior of fly ash (FA)/polypropylene (PP) composites was studied by differential scanning calorimetry (DSC), and crystallization kinetics of Jeziorny and Mo methods was discussed, at last, The activation energy was computed by Flynn-Wall-Ozawa equation. The results show that, after adding FA into PP, the crystallization onset temperature (To), crystallization peak temperature (Tp), Avrami exponent n, half-time of crystallization (t1/2) and cooling rate F(T) of the composites increased, and crystallization rate constant (Zc) decreased. When FA adding content was 15wt%, t1/2, activation energy and F(T) was the smallest, and Zc was the highest. The activation energy of the composites were higher than the pure PP.

中图分类号 TQ320.1 TQ315.14

 
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所属栏目 物理模拟与数值模拟

基金项目 河南省高等学校矿业工程材料重点学科开放实验室开放基金项目(MEM11-10); 河南省煤矿安全生产项目(H12-089); 河南理工大学博士基金资助项目(B2013-10)

收稿日期 2012/12/19

修改稿日期 2013/10/25

网络出版日期

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备注何小芳(1980-), 女, 河南许昌人, 副教授, 博士。

引用该论文: HE Xiao-fang,LUO Si-hai,ZHANG Chong,CAO Xin-xin. Non-isothermal Crystallization Kinetics Behavior of Fly Ash/Polypropylene Composites[J]. Materials for mechancial engineering, 2014, 38(1): 79~85
何小芳,罗四海,张崇,曹新鑫. 粉煤灰/聚丙烯复合材料的非等温结晶动力学行为[J]. 机械工程材料, 2014, 38(1): 79~85


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