摘要
采用熔融缩聚法制备了聚对苯二甲酸乙二醇酯/聚丙二醇共聚醚酯(PET/PPG),并采用核磁共振氢谱(1HNMR)、热重分析(TGA)、差示扫描量热分析(DSC)、动态热分析(DMA)等研究了材料的结构与热性能,1H-NMR结果证明了PET/PPG共聚物结构的存在,而且共聚物的组成与投料比非常接近;热分析的结果表明,聚醚链段的引入对热稳定性和熔融温度的影响不大,而玻璃化转变温度、冷结晶温度、冷结晶焓、储能模量、损耗正切的峰温均有明显下降。
Poly (ethylene terephthalate)/poly propylene glycol copolyether-ester has been prepared by molten polycondensation.Structure and thermal properties of the materials were characterized by means of 1 H-NMR,TGA, DSC and DMA.1 H-NMR results confirmed the existence of structure of PET/PPG copolymers and showed that the compositions of the copolymers were very near the reactant ratio.Thermal analysis results indicated that with the in-troduction of PPG had almost no effect on the thermal degradability and melting point of the copolymer,but glass transition temperature,cold crystallization temperature,crystallization enthalpy,storage modulus as well as the temperature of max tanδdecreased obviously.
出处
《合成技术及应用》
2014年第4期13-16,共4页
Synthetic Technology & Application
基金
江苏省产学研基金资助(BY2013030-03)
关键词
PET
PPG
共聚醚酯
热性能
PET
PPG
copolyether-ester
thermal properties
