含 dl-苹果酸单元的 PBS 共聚酯的热性能和酶降解。

Thermal properties and enzymatic degradation of PBS copolyesters containing dl-malic acid units.

机构信息

College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, No.29, 13th Avenue, TEDA, 300457, Tianjin, PR China.

出版信息

Chemosphere. 2021 Jun;272:129543. doi: 10.1016/j.chemosphere.2021.129543. Epub 2021 Jan 15.

DOI:10.1016/j.chemosphere.2021.129543

PMID:33485038

Abstract

A series of biodegradable copolyester of poly (butylene succinate-co-butylene malate) (P (BS-co-BM)) bearing hydroxyl groups were prepared by one-pot synthetic strategy without hydroxy-protection. The structure and properties of the P (BS-co-BM) were characterized by nuclear magnetic resonance (H NMR), thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), polarized optical microscope (POM), contact angle tester and enzymatic degradation. The results showed that the P (BS-co-BM) manifested excellent thermal properties. The glass transition temperature (T) of the P (BS-co-BM) increased with malic acid units added, the crystallizability temperature (T) decreased from 72.6 °C to 21.7 °C, and the melting point temperature (T) decreased from 117.9 °C to 82.4 °C. The crystallization rate of poly(butylene succinate) (PBS) segment within P (BS-co-BM) was improved by the introduction of malic acid. The enzymatic degradation rate increased with hydrophilicity of the copolyester improving.

摘要

一系列带有羟基的可生物降解共聚酯聚（丁二酸丁二醇酯 - 共 - 丁二酸马来酸酯）（P（BS-co-BM））由无羟基保护的一锅合成策略制备。通过核磁共振（H NMR）、热重分析（TGA）、差示扫描量热法（DSC）、偏光显微镜（POM）、接触角测试仪和酶降解对 P（BS-co-BM）的结构和性能进行了表征。结果表明，P（BS-co-BM）表现出优异的热性能。P（BS-co-BM）的玻璃化转变温度（T）随马来酸单元的加入而升高，结晶温度（T）从 72.6°C 降低至 21.7°C，熔点温度（T）从 117.9°C 降低至 82.4°C。马来酸的引入提高了聚丁二酸丁二醇酯（PBS）段的结晶速率。随着共聚酯亲水性的提高，酶降解速率增加。