中国塑料 ›› 2015, Vol. 29 ›› Issue (05): 54-59 .DOI: 10.19491/j.issn.1001-9278.2015.05.010

• 材料与性能 • 上一篇    下一篇

扩链剂对聚对苯二甲酸乙二醇酯流变性能和发泡性能影响

刘本刚1,粟宇豪2,刘海明3,王向东4,张永佳3   

  1. 1. 轻工业塑料加工应用研究所2. 北京化工大学生命科学与技术学院3. 北京工商大学材料与机械工程学院4. 北京工商大学材料科学与工程系
  • 收稿日期:2015-12-25 修回日期:2015-02-08 出版日期:2015-05-26 发布日期:2015-05-26

Rheological and Foaming Behavior of Chain Extended Poly(ethylene terephthalate)

  • Received:2015-12-25 Revised:2015-02-08 Online:2015-05-26 Published:2015-05-26

摘要: 采用均苯四甲酸酐(PMDA)作为聚对苯二甲酸乙二醇酯(PET)的扩链剂制备了扩链改性PET(CEPET),并以超临界二氧化碳(CO2)为物理发泡剂,采用釜压法制备了CEPET泡沫;通过旋转流变仪和扫描电子显微镜研究了CEPET的流变性能和CEPET泡沫的泡孔结构。结果表明,随着PMDA含量的增加,CEPET试样的储能模量逐渐增加,损耗因子逐渐降低,CEPET的熔体强度明显高于纯PET;CEPET泡沫的泡孔形态得到改善,发泡倍率得到提高;加入1.0 份(质量份,下同)扩链剂时,发泡倍率能够达到32.55倍。

关键词: 聚对苯二甲酸乙二醇酯, 均苯四甲酸酐, 扩链剂, 流变性能, 发泡性能

Abstract: Poly(ethylene terephthalate) (CEPET) was chain extended with pyromelliticdianhydride (PMDA), which was foamed by batch method using CO2 as a foaming agent. Rheological behavior and cellular structure of CEPET foam were analyzed by rotational rheometer and scanning electron microscope. It showed that the storage modulus of CEPET was increased with increasing PMDA dosage, and the loss factor changed in an opposite way. The introduction of PMDA improved the melt strength and cellular morphology of neat PET. The expansion ratio of CEPET foam with a PMDA content of 1.0 phr was 32.55.

Key words: poly (ethylene terephthalate), pyromellitic dianhydride, chain extender, rheology behavior, foaming