摘要
采用连续自由基聚合法合成的大分子环氧扩链剂(聚甲基丙烯酸甲酯/甲基丙烯酸环氧丙酯)共聚物(PMMA-co-GMA)作为聚对苯二甲酸乙二酯(PET)的改性剂,考察了大分子环氧扩链剂的用量及聚合度对PET流变性能和结晶性能的影响。结果表明,随着扩链剂用量及聚合度的增加,PET共混物的扭矩和温度都明显提高,到达最大扭矩及温度的时间均提前;大分子环氧扩链剂的引入使PET共混物的结晶温度降低,结晶峰峰值降低,峰面积减小,PET的结晶度降低;PET共混物经热处理后结晶行为发生变化。
An epoxy macromolecular chain extender（PMMA-co-GMA） was synthesized by continuous random free radical polymerization, which was introduced into poly（ethylene terephthalate）（PET） and PET blends. Influences of the content and the polymerization degree of PMMA-co-GMA on rheological and crystallization properties of PET blends were investigated. The results show that the modified PET blends exhibited higher torque and temperature with increasing the content and the polymerization degree of PMMA-co-GMA. The time of reaching maximum torques and temperature are in advanced. The crystallization temperature, crystallization peak value and crystallization degree of PET blends decreased when adding PMMA-co-GMA. The crystallization behaviors of PET is effected by annealing.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2013年第11期9-13,共5页
Engineering Plastics Application
关键词
聚对苯二甲酸乙二酯
扩链剂
反应共混
结晶
poly（ethylene terephthalate）
chain extender
reaction blending
crystallization
