Nifant'ev Ilya E, Bagrov Vladimir V, Komarov Pavel D, Ilyin Sergey O, Ivchenko Pavel V
A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Pr., 119991 Moscow, Russia.
Chemistry Department, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia.
Polymers (Basel). 2022 Apr 22;14(9):1720. doi: 10.3390/polym14091720.
Biodegradable polyesters represent an advanced alternative to polyolefin plastics in various applications. Polybutylene adipate terephthalate (PBAT) can compete with polyolefins in terms of their mechanical characteristics and melt processing conditions. The properties of PBAT depend on the molecular weight, dispersity, and architecture of the copolymer. Long-chain branching (LCB) of the PBAT backbone is an efficient method for the improvement of the copolymer characteristics. In the present work, we studied branching agents (BAs) - of different structures in the two-stage polycondensation of 1,4-butanediol, dimethyl terephthalate, and adipic acid and investigated the composition and melt rheology of the copolymers. According to the results of the research, 1,1,1-tris(hydroxymethyl)ethane and 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid outperformed glycerol as BAs in terms of shear thinning behavior and viscoelasticity.
在各种应用中，可生物降解聚酯是聚烯烃塑料的一种先进替代品。聚己二酸对苯二甲酸丁二醇酯（PBAT）在机械性能和熔体加工条件方面可与聚烯烃相媲美。PBAT的性能取决于共聚物的分子量、分散度和结构。PBAT主链的长链支化（LCB）是改善共聚物性能的有效方法。在本工作中，我们研究了在1,4-丁二醇、对苯二甲酸二甲酯和己二酸的两步缩聚反应中不同结构的支化剂（BA），并研究了共聚物的组成和熔体流变学。根据研究结果，1,1,1-三（羟甲基）乙烷和3-羟基-2-（羟甲基）-2-甲基丙酸作为支化剂在剪切变稀行为和粘弹性方面优于甘油。
