摘要
采用熔融缩聚法合成了聚对苯二甲酸乙二醇酯(PET)-四氢呋喃聚醚(PTMG)聚醚酯,用IR、13C-NMR等手段表征了材料的结构、序列分布与嵌段比例,讨论了缩聚催化剂种类、浓度及缩聚时间等反应条件对PET PTMG聚醚酯的特性粘数的影响。结果表明,PET PTMG聚醚酯呈现酯、醚键的结构特征,并且是无规嵌段共聚物。
poly (ether-ester) based on poly (ethylene terephthalate)-poly (tetramethylene glycol) (PET-PTMG) was synthesized by melt polycondensation.The structure and sequence distribution of PET-PTMG poly (ether-ester) were measured by IR,13C-NMR.The effects of various reaction conditions such as kinds of catalyst and its concentration,polycondensation reaction time on the intrinsic viscosity of poly (ether-ester) were also discussed.The results showed the structure of polymer is ether bond and ester bond,and PET-PTMG poly (ether-ester) is random block copolymer.
出处
《化学工业与工程》
CAS
2003年第3期139-144,149,共7页
Chemical Industry and Engineering
