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。
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 1.0phr was 32.55.
出处
《中国塑料》
CAS
CSCD
北大核心
2015年第5期54-59,共6页
China Plastics
基金
科技部科研院所技术开发研究专项资金项目(2013EG111219)
北京市属高等学校人才强教计划项目(201108078)
