Non-isothermal Melt Crystallization Kinetics of Anhydrite-Filled Polypropylene Composites

作     者：王少会 WANG Shaohui1, XU Weibing2, ZHOU Zhengfa2, REN Fengmei2 (1. Department of Chemistry and Chemical Engineering, East China JiaoTong University, Nanchang 330013, China;2. Department of Polymer Science and Engineering, Hefei University of Technology, Hefei 230009, China)

作者机构：Department of Chemistry and Chemical EngineeringEast China JiaoTong University 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2010年第25卷第1期

页      面：12-19页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：polypropylene anhydrite composites non-isothermal crystallization kinetics 

摘      要：The non-isothermal crystallization kinetics of polypropylene （PP）, PP/anhydrite composites were investigated by differential scanning calorimetry （DSC） with various cooling rates. The Avrami analysis modified by Jeziorny and a method developed by Mo were employed to describe the non-isothermal crystallization process of these samples. The difference in the exponent n between PP and PP/anhydrite composites indicated that non-isothermal kinetic crystallization corresponded to tri-dimensional growth with heterogeneous nucleation. The values of half-time, Zc and F（T） showed that the crystallization rate increased with the increasing of cooling rates for PP and PP/anhydrite composites, but the crystallization rate of PP/anhydrite composites was faster than that of PP at a given cooling rate. The method developed by Ozawa did not describe the non-isothermal crystallization process of PP very well. Moreover, the method proposed by Kissinger was used to evaluate the activation energy of the mentioned samples. The result showed that the activation energy of PP/anhydrite was greatly larger than that of PP.