The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Int J Biol Macromol. 2024 Mar;262(Pt 1):130029. doi: 10.1016/j.ijbiomac.2024.130029. Epub 2024 Feb 8.
The wide application of fully biodegradable polylactic acid/polybutylene terephthalate (PLA/PBAT) blends in environmentally friendly packaging were limited because of poor compatibility. Normal compatibilizers suffer from poor thermal stability and non-biodegradability. In this work, epoxy copolymer (MDOG) with different molecular structures were made of 2-methylene-1, 3-dioxoheptane, and glycidyl methacrylate as raw materials by free radical copolymerization. MDOG copolymers have good biodegradability and a high thermal decomposition temperature of 361 °C. The chemical reaction of the epoxy groups in MDOG with PLA and PBAT during the melting reaction improved the interfacial bonding by decreasing the particle size of PBAT. Compared to the PLA/PBAT blends, the tensile strength and fracture toughness of PLA/PBAT/MDOG blends were enhanced to 34.6 MPa and 115.8 MJ/m, which are 25 % and 81 % higher, respectively. As a result, this work offers new methods for developing thermally stable and biodegradable compatibilizers, which will hopefully promote the development of packaging industry.
全生物降解聚乳酸/聚对苯二甲酸丁二醇酯（PLA/PBAT）共混物由于相容性差，其在环保包装中的广泛应用受到限制。普通增容剂存在热稳定性差和不可生物降解的缺点。本工作以 2-亚甲基-1,3-二氧杂环庚烷和甲基丙烯酸缩水甘油酯为原料，自由基共聚合成了具有不同分子结构的环氧嵌段共聚物（MDOG）。MDOG 共聚物具有良好的生物降解性和高达 361°C 的热分解温度。MDOG 中的环氧基团在熔融反应中与 PLA 和 PBAT 发生化学反应，通过降低 PBAT 的粒径来改善界面结合。与 PLA/PBAT 共混物相比，PLA/PBAT/MDOG 共混物的拉伸强度和断裂韧性分别提高到 34.6 MPa 和 115.8 MJ/m，分别提高了 25%和 81%。因此，这项工作为开发热稳定和可生物降解的增容剂提供了新的方法，有望促进包装工业的发展。
Zotero 插件