中国炼油与石油化工 ›› 2012, Vol. 14 ›› Issue (1): 74-79.

• Petrochemical Research • 上一篇    下一篇

PBAT共聚酯的非等温结晶动力学的研究

王晓慧1,史君2,陈颖3,付志峰1,石艳1   

  1. 1. 北京化工大学
    2. 北京化工大学;辽阳石化分公司
    3. 中国石油辽阳石化公司
  • 收稿日期:2011-02-18 修回日期:2011-12-16 出版日期:2012-03-30 发布日期:2012-03-30
  • 通讯作者: 史君 E-mail:yjyshijun@petrochina.com.cn

Nonisothermal Crystallization Kinetics of Poly(butylene adipate-co-terephthalate) Copolyester

  • Received:2011-02-18 Revised:2011-12-16 Online:2012-03-30 Published:2012-03-30

摘要: 采用直接酯化法制备了一系列聚(己二酸丁二醇酯-co-对苯二甲酸丁二醇酯)(PBAT)共聚酯。采用DSC方法考察了共聚酯的非等温结晶过程,并用改进Avrami法及莫志深法研究了共聚酯的非等温结晶动力学。研究结果表明:采用Avrami 方程能很好的描述共聚酯PBAT的初始结晶过程;共聚酯PBAT可能产生二次结晶现象;结晶速率常数Zc随着降温速率的增大而增大,Avrami指数在2.3左右;在给定的降温速率下,结晶速率常数Zc随着己二酸含量的增大呈递减趋势。另外,采用莫志深法可以很好地描述共聚酯的非等温过程。

Abstract: Nonisothermal crystallization behavior of poly(butylene adipate-co-terephthalate) (PBAT) synthesized by direct esterification and polycondensation were investigated by differential scanning calorimeter (DSC). The Avrami equation modified by Jeziorny and Z.S. Mo equation were employed to describe the nonisothermal crystallization kinetics. The results showed that the Avrami equation was successful in describing nonisothermal crystallization process of PBAT copolyesters. PBAT copolyester could give birth to secondary crystallization. The crystallization parameter (Zc) increased with the increase of cooling rate and the Avrami exponent (n) was around 2.3. For a given cooling rate, the value of Zc had a decrease trend with adipic acid (AA) content increasing.Z.S. Mo equation was successful in describing the nonisothermal crystallization kinetics of PBAT copolyesters.