塑料科技2024，Vol.52Issue(7)：7-11,5.DOI:10.15925/j.cnki.issn1005-3360.2024.07.002
环氧化改性GTR对聚乳酸结构与性能的影响
Effect of Epoxide-Modified GTR on the Structure and Properties of PLA
摘要
Abstract
After altering ground tire rubber(GTR)with formic acid and hydrogen peroxide,the epoxidation product(EGTR)was produced.The poly(lactic acid)(PLA)/EGTR blends were then made using the melt blending method,and their micro-morphology,crystalline behavior,and mechanical properties were all carefully examined.The results showed that the carbon-carbon double bond on the GTR molecular chain was successfully oxidized to an epoxy group by formic acid and hydrogen peroxide.The EGTR particles were evenly distributed throughout the PLA matrix,demonstrating good compatibility between the two phases.Furthermore,low levels of EGTR promote PLA crystallization,while high levels of EGTR inhibit PLA crystallization.The PLA/5% EGTR blends had the highest crystallinity of 11.1%,which was 4.8 times higher than that of pure PLA.The blends tensile strength declined as the EGTR content increased,while the impact strength and elongation at break showed a tendency of first increasing and then decreasing.When 10% EGTR was added,the blends had the maximum elongation at break and impact strength,with good toughening effect and tensile strength,showing the best overall mechanical properties.The study provides a basis and technical foundation for modifying PLA with GTR as a toughening material and promotes the recycling of waste rubber.关键词
聚乳酸/废旧橡胶粉/环氧化改性/相容性/力学性能Key words
Poly(lactic acid)/Ground tire rubber/Epoxide modification/Interface compatibility/Mechanical property分类
通用工业技术引用本文复制引用
胡永祥,高爱国,谢纪岭,汤香港,申红望,鞠冠男..环氧化改性GTR对聚乳酸结构与性能的影响[J].塑料科技,2024,52(7):7-11,5.基金项目
山东省科技型中小企业创新提升工程(2022TSGC1166,2023TSGC0589) （2022TSGC1166,2023TSGC0589）
山东省自然科学基金(ZR2023ME233) （ZR2023ME233）
