2, 2′-联噻唑-4, 4′-二甲酸对聚丁二酸丁二醇酯共聚改性及其性能.

A series of poly (butylene succinate-co-ethylene 2, 2'-bisthiazole-4, 4'-dicarboxylate) (PBEBS) were synthesized by melt polycondensation using 1, 4-butanedioic acid (SA), 1, 4-butanediol (BDO) and diethyl 2, 2'-bisthiazole-4, 4'-dicarboxylate (BTDC-Et) as raw materials. In order to further understand its structure and properties, nuclear magnetic resonance (NMR), differential scanning calorimeter (DSC), gel permeation chromatography (GPC), fourier transform infrared spectrometer (FT-IR) and gas barrier tester were used for detailed characterization. The experimental results showed that when the feed molar ratio of SA∶BDO∶BTDC-Et was 1∶2. 5∶0. 1, the number average molecular mass of PBEBS reached 41000 and the material changed from brittle to ductile plastic. At the same time, compared with polybutylene succinate (PBS), the carbon dioxide gas barrier performance is improved by 80 times. In addition, the thermal stability of PBEBS copolyesters increased with the increase of BTDC-Et feed ratio, and the decomposition temperature Td, 5% increased from 295 to 346 ℃. [ABSTRACT FROM AUTHOR]