中国塑料 ›› 2015, Vol. 29 ›› Issue (06): 34-38.DOI: 10.19491/j.issn.1001-9278.2015.06.006

• 材料与性能 • 上一篇    下一篇

辛烯共聚聚乙烯树脂非等温结晶动力学

胡跃鑫1,韩向艳2   

  1. 1. 辽宁石油化工大学;中国石油天然气股份有限公司抚顺石化分公司2. 辽宁石油化工大学
  • 收稿日期:2014-12-29 修回日期:2015-03-08 出版日期:2016-06-26 发布日期:2016-06-26

Non-isothermal Crystallization Kinetics of PERT

  • Received:2014-12-29 Revised:2015-03-08 Online:2016-06-26 Published:2016-06-26

摘要: 利用差示扫描量热仪研究了共聚单体含量和支链分布对辛烯共聚聚乙烯树脂非等温结晶动力学的影响。结果表明,共聚单体含量越多,支链分布越均匀,半结晶时间越长,结晶增长速率常数(Zc)越小,冷却速率越大;结晶生长维数随着降温速率的增加在2~3之间变化;随着结晶度的增加,Avrami指数(n)与Ozawa指数(m)的比值(a)变化较小。

关键词: 辛烯共聚聚乙烯树脂, 非等温结晶动力学, 支链分布, 结晶度

Abstract: The effect of comonomer content and branched chain distribution on nonisothermal crystallization kinetics of polyethylene octene copolymer was studied by differential scanning calorimeter. It showed that the half crystallization time t1/2 and the cooling rate increased, but the crystallization rate constant Zc reduced with increasing comonomer content and increasing uniformity of branched chain distribution. The crystal growth dimension n changed between 2~3. The ratio of Avrami index n and Ozawa index m kept stable with increasing crystallinity.

Key words: polyethylene octene copolymer, nonisothermal crystallization kinetics, branched chain distribution, crystallinity