成核母粒在PBT/PET合金中的应用  

Applications of Nucleating Masterbatch in PBT/PET Alloy

作　　者：金建[1] 杨喆[1] 

机构地区：[1]生物源纤维制造技术国家重点实验室中国纺织科学研究院,北京100025

出　　处：《中国塑料》2008年第10期72-75,共4页China Plastics

摘　　要：制备了增强阻燃聚对苯二甲酸丁二醇酯(PBT)聚对苯二甲酸乙二醇酯(PET)合金。向 PBT/PET 合金中添加成核母粒 Nu-2,研究了添加成核母粒后 PBT/PET 合金的结晶性能和力学性能。结果表明,PBT/PET 和 PBT/PET/Nu-2共混体系中均只能观察到一个玻璃化转变温度(T_g);共混体系的 T_g 介于两纯组分的 T_g 之间,随 PBT 含量的增加而下降。成核母粒的加入一定程度上解决了 PBT/PET 合金中 PET 结晶速度慢的问题,特别对 PBT/PET合金结晶温度 T_(mc)的改善十分有效。不同比例的合金 T_(mc)从187.10℃上升到189.91℃,与 PBT 的 T_(mc)(191.9℃)相差无几。同时从升温曲线可以看出熔融峰 T_(m1)和 T_(m2)完全分开,这表明 PBT/PET 合金未发生明显的酯交换反应,即酯交换反应得到了抑制。A series glass fiber reinforced and flame retardant PBT/PET alloys were prepared and their crystallization behavior was studied. Nucleation masterbatch Nu-2 was introduced into the alloy to enhance crystallization. Only one glass transition temperature （Zg） can be observed in PBT/PET and PBT/PET/Nu-2. Tg of the blends decreased with increasing PBT and was between the Tg of two pure components. Nu-2 can improve the crystallization speed of PET. Tmc of PBT/PET/Nu-2 was between 187.10 ℃ and 189.91 ℃, near that of neat PBT （ 191.9 ℃ ）. Heating curves showed that melting peaks Tm1 and Tm2 were completely separated. Transesterification of PBT and PEW was restrained.

关 键 词：聚对苯二甲酸乙二醇酯 聚对苯二甲酸丁二醇酯 成核母粒 结晶性能 力学性能 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业] TG131[一般工业技术—材料科学与工程]