Synthesis of poly(butylene terephthalate)-poly(tetramethylene glycol) copolymers using terephthalic acid as starting material: A comparation between two synthetic strategies
Synthesis of poly(butylene terephthalate)-poly(tetramethylene glycol) copolymers using terephthalic acid as starting material: A comparation between two synthetic strategies
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DOI：
10.1007/s10118-015-1673-4
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发表时间：
2015-07
影响因子：
4.3
通讯作者：
Jun-wu Zhang;Fei Liu;Jinggang Wang;Haining Na;Jin Zhu
中科院分区：
文献类型：
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作者：
Jun-wu Zhang;Fei Liu;Jinggang Wang;Haining Na;Jin Zhu
以对苯二甲酸（PTA）为原料，采用两步熔融缩聚法合成了聚对苯二甲酸丁二醇酯-聚四亚甲基二醇（PBT-PTMG）共聚物。该方法包括在第一步中由PTA与1，4-丁二醇（BDO）合成PBT预聚物，然后在第二步中由PBT预聚物与PTMG合成PBT-PTMG共聚物。比较了两步熔融缩聚产物与传统一步熔融缩聚产物的分子量、组成、热性能和力学性能。当PTMG含量较低时，两种方法得到的PBT-PTMG共聚物的分子量、组成、热性能和力学性能差别不大。然而，当PTMG含量高时，只有两步策略能够得到高分子量的产物，并且产物具有与使用DMT作为起始原料的传统一步策略相当的热性能和机械性能。
Poly(butylene terephthalate)-poly(tetramethylene glycol) (PBT-PTMG) copolymer is prepared with terephthalic acid (PTA) rather than its dimethyl ester (DMT) as starting material by a two-step melt polycondensation. This process includes the synthesis of PBT prepolymer from PTA with 1,4-butanediol (BDO) in the first step, followed by the synthesis of PBT-PTMG copolymer from PBT prepolymer with PTMG in the second step. The molecular weight, composition as well as thermal and mechanical properties of the products from the two-step melt polycondensation are compared with the properties of the PBT-PTMG from the traditional one-step melt polycondensation. When the PTMG content is low, there is only slight difference in molecular weight, composition, thermal and mechanical properties among PBT-PTMG copolymers obtained from these two methods. However, when the PTMG content is high, only the two-step strategy is able to give high molecular weight products, and the products have comparable thermal and mechanical properties with those from traditional one-step strategy using DMT as starting material.