聚醚醚酮/聚酯液晶二元和三元增容共混体系的等温结晶动力学及结晶形态

聚醚醚酮/聚酯液晶二元和三元增容共混体系的等温结晶动力学及结晶形态

杨延华, 关绍巍, 王力风, 姜振华

吉林大学化学学院，长春 130021

收稿日期:2006-04-18 修回日期:1900-01-01 出版日期:2006-11-26 发布日期:2006-11-26
通讯作者: 姜振华

Crystallization Kinetics and Crystalline Morphology ofCompatibilized Blends of Liquid Crystalline Polymer with PEEK

YANG Yanhua, GUAN Shaowei, WANG Lifeng, JIANG Zhenhua

College of Chemistry, Jilin University, Changchun 130021, China

Received:2006-04-18 Revised:1900-01-01 Online:2006-11-26 Published:2006-11-26
Contact: JIANG Zhenhua

摘要/Abstract

摘要： 采取熔融共混方法制备了聚醚醚酮（PEEK）和聚酯液晶（TLCP）二元和三元增容共混物，用DSC和PLM对共混物的结晶行为和结晶形态进行了研究. 结果表明， TLCP的存在使PEEK的结晶温度和结晶起始温度均略有升高，增容剂（RCP）的加入延缓了PEEK结晶过程. 等温结晶动力学研究表明，液晶的加入加快了聚醚醚酮的结晶速度，但随其含量增加结晶速度降低. 与二元共混物相比，加入增容剂后对聚醚醚酮的结晶速度基本无影响. 增容后的聚醚醚酮球晶的尺寸下降，很难看到Maltese十字消光.

关键词: 聚醚醚酮, 聚酯液晶, 共混物, 增容剂, 等温结晶, 球晶

Abstract: A fully aromatic liquid crystalline polyester (TLCP) was blended with poly(ether ether ketone), PEEK. Random copolymer (RCP) was used as the compatibilizer in the blends. The isothermal crystallization kinetics and morphologies of compatibilized blends were studied with differential scanning calorimetry (DSC） and polar light micrograph (PLM). TLCP acted as a heterogenous nucleation sites to accelerate the crystallization of PEEK. However, PEEK crystallization rate decreased with increasing TLCP fraction. Isothermal crystallization exotherms showed that the addition of RCP showed no significant influence on the crystallization of PEEK in blends. PLM observation showed that it was difficult to discern the single PEEK spherulites.

Key words: poly(ether ether ketone),  thermotropic liquid crystalline polyester, blends, compatibilizer, isothermal crystallization, spherulites 

中图分类号:

O631

杨延华, 关绍巍, 王力风, 姜振华. 聚醚醚酮/聚酯液晶二元和三元增容共混体系的等温结晶动力学及结晶形态[J]. J4, 2006, 44(06): 984-988.

YANG Yanhua, GUAN Shaowei, WANG Lifeng, JIANG Zhenhua. Crystallization Kinetics and Crystalline Morphology ofCompatibilized Blends of Liquid Crystalline Polymer with PEEK[J]. J4, 2006, 44(06): 984-988.

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