通过乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯共聚物进行反应性熔融共混提高聚乳酸/磷酸锆纳米复合材料的韧性
Enhancing Toughness of PLA/ZrP Nanocomposite through Reactive Melt-Mixing by Ethylene-Methyl Acrylate-Glycidyl Methacrylate Copolymer.
作者信息
Zhu Chuanbiao, Lu Xiang, Li Yi, Deng Yanhong, Lu Jiuling, Liu Zhigang, Wu Hao, Tong Yi, Qu Jinping
机构信息
Key Laboratory of Material Chemistry for Energy Conversion and Storage of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, China.
Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science & Technology, Wuhan 430074, China.
出版信息
Polymers (Basel). 2022 Sep 7;14(18):3748. doi: 10.3390/polym14183748.
The nanofiller zirconium phosphate (ZrP) was mixed into poly(lactic acid) (PLA) to ameliorate its thermal stability. The elastomer ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA) was introduced into the PLA/ZrP nanocomposite through melt-mixing to improve its toughness and obtain a super-tough PLA/ZrP/E-MA-GMA nanocomposite. The impact strength of the PLA/ZrP/E-MA-GMA nanocomposite, with a composition ratio of 72/3/25, was improved to 71.5 kJ/m, about 25 times greater than the impact strength of pure PLA. The dynamic mechanical analysis (DMA) confirmed that E-MA-GMA has excellent compatibility with the matrix of PLA. A typical core-shell structure that can cause massive shear-yielding deformation was characterized by transmission electron microscopy (TEM), which gave the nanocomposite excellent toughness.
将纳米填料磷酸锆（ZrP）混入聚乳酸（PLA）中以改善其热稳定性。通过熔融共混将弹性体乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯共聚物（E-MA-GMA）引入PLA/ZrP纳米复合材料中，以提高其韧性并获得超韧性PLA/ZrP/E-MA-GMA纳米复合材料。组成比为72/3/25的PLA/ZrP/E-MA-GMA纳米复合材料的冲击强度提高到71.5 kJ/m，约为纯PLA冲击强度的25倍。动态力学分析（DMA）证实E-MA-GMA与PLA基体具有优异的相容性。通过透射电子显微镜（TEM）表征了一种能够引起大量剪切屈服变形的典型核壳结构，这赋予了纳米复合材料优异的韧性。
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