中国塑料

中国塑料 ›› 2008, Vol. 22 ›› Issue (08): 30-35 .DOI: 10.19491/j.issn.1001-9278.2008.08.007

• 材料与性能 • 上一篇    下一篇

动态固化PP /PP-g-MAH /EP共混物非等温结晶动力学研究

江学良，张隐西
   

  1. １．武汉工程大学等离子体化学与新材料湖北省重点实验室，湖北武汉４３００７３；２．上海交通大学高分子材料研究所，上海２０００３０
  • 收稿日期:2008-03-26 修回日期:1900-01-01 出版日期:2008-08-26 发布日期:2008-08-26

Non-isothermal Crystallization Kinetics of Dynamically Cured PP/PP-g-MAH/Epoxy Blends

JIANG Xue-liang，ZHANG Yin-xi   

  1. I .Province Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology，Wuhan 430073, China;2. Research Institute of Polyrmer Materials, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2008-03-26 Revised:1900-01-01 Online:2008-08-26 Published:2008-08-26
  • Contact: JIANG Xue-liang

摘要： 利用差示扫描量热方法研究了马来酸配接枝聚丙烯(PP-g-MAH)增容动态固化聚丙烯(PP) /环氧树脂(EP)共混物非等温结晶过程，并运用(hawa方程和Kissinger方程进行相关数据处理，同时研究共混物晶体结构。结果表明，动态固化PP/PP-g-MAH/EP共混物中EP颗粒可明显促进PP的结晶，(hawa方程可以有效处理PP和共混物非等温结晶过程，在相同温度下共混物中PP的结晶速率常数[K}(T)〕大于纯PP的[K} (T)]。依据Kissinger方程，
共混物中PP的结晶活化能(4E)明显小于纯PP的，在EP含量为20份(质量份数，下同)时，4E有一极小值。偏光显微镜显示PP的晶粒是典型的球形结构，其晶粒尺寸明显大于动态固化PP /PP-g-MAH/EP共混物中PP晶粒尺寸。

关键词: 聚丙烯, 环氧树脂, 动态固化, 非等温结晶, 结晶动力学

Abstract: The non-isothermal crystallization behavior of dynamically cured polypropylene(PP)/epoxy(EP) blends compatibilizcd with malcic anhydride grafted PP(PP-g-M八H) was studied with difFcrcn-tial scanning calorimetry. The experiment data were treated with Ozawa and Kissinger equations, the
crystalline structure of PP in the blends was also studied. It showed that the cured epoxy particles acccl-crate the crystallization of PP component. The non-isothermal crystallization kinetics of both neat PP and PP in the blends can be well approximated by Ozawa equation, and the kinetic constant K(T) of PP in blends was higher than that of neat PP.八ccording to Kissingcr'、method，the crystallization acti-vation(OF_)of PP in the blends was lower than that of neat PP, and a minimum of OF_ was observed at an epoxy resin weight concentration of 20 phr. Polarized optical microscopy showed that the size of neatPP spherulites was obviously larger than those in blends.

Key words: polypropylene, epoxy resin, dynamical cure, non-isothermal crystallization, crystallization kinetics

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