文献类型：期刊文献

英文题名：Enhanced Soil Burial Degradation of Poly(L-Lactide) by Blending With Poly(Ether-Block-Amide)

作者：Cui, Jinsen[1];Li, Lixing[1];Chen, Zhibo[1];Wang, Shutao[1];Meng, Fanshen[1];Lin, Yu[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai, Peoples R China

年份：2026

卷号：227

期号：1

外文期刊名：MACROMOLECULAR CHEMISTRY AND PHYSICS

收录：;EI(收录号：20260319932010);WOS:【SCI-EXPANDED(收录号:WOS:001664363400021)】；

基金：ThisworkwassupportedbytheNationalNaturalScienceFoundationofChina(51503066)andtheShanghaiSailingProgram(14YF1404900).

语种：英文

外文关键词：mechanical properties; molecular weight; phase morphology; soil burial degradation; thermodynamic properties

摘要：Plastic pollution is a significant environmental issue, and poly(L-lactide) (PLLA) is one of the most common biodegradable polymers that meets current environmental protection needs. However, enhancing its degradation rate in soil remains a continuing challenge. Herein, we mainly investigate the phase morphology evolution, mass loss, molecular weight loss, mechanical properties, thermodynamic properties, and molecular structure changes during the soil burial degradation of PLLA/poly(ether-block-amide) (PEBA) blends. After 90 days of soil burial degradation, the mass loss of PLLA/PEBA (80/20) blend and pure PLLA is 17.3% and 2.3%, the weight-average molecular weight loss is 24.7% and 15.8%, and the tensile strength decreases by 75.6% and 32.2%, respectively, suggesting a faster soil burial degradation rate of the blend. The enhanced degradation rate is attributed to the existence of phase interfaces, which is beneficial to the water absorption and the attack of microorganisms. Soil burial degradation primarily occurs in the amorphous regions of PLLA, leading to an increase in the relative content of crystalline regions. The molecular structure changes reveal that the mechanism of soil burial degradation of PLLA mainly involves random chain scission of the ester groups on the backbones.