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  

Copolymerization Modification and Properties of Poly(butylene succinate)by 2,2'-Bithiazole-4,4'-Dicarboxylic Acid

作　　者：罗昱嵩 王瑞 LUO Yu-Song;WANG Rui(Dalian Institute of Chemical Physics,Chinese Academy of Sciences,High Performance Polymer Materials Research Center,Dalian 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院大连化学物理研究所,高性能高分子材料研究中心,大连116023 [2]中国科学院大学,北京100049

出　　处：《应用化学》2024年第11期1565-1571,共7页Chinese Journal of Applied Chemistry

基　　金：国家重点研发计划青年科学家项目(No.2022YFC2105800)资助。

摘　　要：以1,4-丁二酸(SA)、1,4-丁二醇(BDO)和2,2′-联噻唑-4,4′-二甲酸二乙酯(BTDC-Et)为原材料,采用熔融缩聚法合成了一系列不同BTDC-Et摩尔分数的聚丁二酸/2,2-联噻唑(E)-4,4-二甲酸(B)-丁二醇酯(S)(PBEBS)。通过核磁共振(NMR)、差示扫描量热(DSC)、凝胶透色谱(GPC)、傅里叶变换红外光谱(FT-IR)以及采用压差法气体渗透等技术手段表征了材料的结构和性能。结果表明,当SA、BDO和BTDC-Et的投料摩尔比为1∶2.5∶0.1时,PBEBS的数均相对分子质量(M_n)达到4.1×10^(4),材料由脆性塑料转变为韧性塑料;同时,与PBS相比,阻隔性能提升了80倍。此外,PBEBS共聚酯的热稳定性随BTDC-Et摩尔分数的增大而升高,分解温度T_(d,5%)由295℃升高至346℃。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 T_(d,5%)increased from 295 to 346℃.

关 键 词：2 2′-联噻唑-4 4′-二甲酸 聚丁二酸丁二醇酯 阻隔性能 

分 类 号：O633.4[理学—高分子化学]