文献类型：期刊文献

英文题名：Preparation of rigidity toughness balance and stable poly(glycolic acid) based on chain extension reaction

作者：Chen, Shiyuan[1,2];Meng, Xin[1,2];Xin, Zhong[1,2];Gong, Weiguang[3];Li, Chenyang[1,2];Wen, Wei[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Prod Engn Dept, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai, Peoples R China

年份：2024

卷号：141

期号：6

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20234715090053);WOS:【SCI-EXPANDED(收录号:WOS:001107408000001)】；

基金：This work was supported by JH Material Scientific Co., Ltd., China.

语种：英文

外文关键词：chain extension; hydrolysis stability; poly(glycolic acid); toughness

摘要：As a completely degradable material, poly(glycolic acid) (PGA) has excellent rigidity, barrier properties, degradability and biocompatibility. However, the inherent brittleness and easily hydrolysable characteristics limit its widespread application. Herein, we introduced chain extension ADR to modify PGA to ameliorate these defects. The results showed that ADR could react with PGA to form "comb-like" and "cross-linked" chain extension structures resulting in the improvement of complex viscosity and formation of gel. Because of the chain entanglement of chain extension structures, the toughness of modified PGA was improved (which was verified by the impact strength value of 4.3 kJ/m2 that was about 126% of virgin PGA) without sacrificing its rigidity. Furthermore, the hydrolysis results indicated that the representative PGA/1.0ADR had better hydrolysis stability, it had more complete morphology and slower degradation rate than virgin PGA in the 17-day hydrolysis experiment. Apart from better toughness and hydrolysis stability, there was also improvements in crystallization performance, the sample PGA/1.0ADR endowed with higher crystallization peak temperature (2.3 degrees C higher than virgin PGA) and lower crystallization activation energy. In short, this work prepared a kind of modified PGA with rigidity toughness balance and better hydrolysis stability, which could expand the application range of PGA-based materials.