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Phase Morphology and Performance of Supertough PLA/EMA–GMA/ZrP Nanocomposites Prepared through Reactive Melt-Blending
ACS Omega ( IF 3.7 ) Pub Date : 2019-11-07 , DOI: 10.1021/acsomega.9b02022 Hao Wu 1 , Aolin Hou 1 , Jin-Ping Qu 1
ACS Omega ( IF 3.7 ) Pub Date : 2019-11-07 , DOI: 10.1021/acsomega.9b02022 Hao Wu 1 , Aolin Hou 1 , Jin-Ping Qu 1
Affiliation
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Nanofiller zirconium phosphate (ZrP) and ethylene-methyl acrylate–glycidyl methacrylate copolymer (EMA–GMA) were introduced into poly(lactic acid) (PLA) through reactive melt-blending method to improve its toughness. The impact strength of PLA/EMA–GMA/ZrP (82/15/3) nanocomposites was improved about 22 times that of pure PLA to 65.5 kJ/m2. Fourier transform infrared spectroscopy (FTIR) analysis indicated there were compatibilization reactions between the components. The miscibility and thermal behavior of the blends were investigated by dynamic mechanical analysis (DMA), differential scanning calorimetric (DSC), and thermogravimetric analysis (TGA). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were applied to observe the fractured surface and phase morphology to study the toughness mechanism. A typical core–shell morphology, ZrP wrapped by EMA–GMA phase, was observed in the nanocomposites, which can cause plastic deformations. The supertough effect of the compound was mainly confirmed by effective interfacial compatibilization and massive shear-yielding deformation achieved by the synergy of EMA–GMA with ZrP in the PLA matrix.
中文翻译：
反应熔融共混制备超韧 PLA/EMA–GMA/ZrP 纳米复合材料的相形貌和性能
通过反应熔融共混方法将纳米填料磷酸锆（ZrP）和乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯共聚物（EMA-GMA）引入聚乳酸（PLA）中以提高其韧性。PLA/EMA-GMA/ZrP(82/15/3)纳米复合材料的冲击强度比纯PLA提高了约22倍，达到65.5 kJ/m 2。傅里叶变换红外光谱（FTIR）分析表明组分之间存在增容反应。通过动态机械分析（DMA）、差示扫描量热（DSC）和热重分析（TGA）研究了共混物的混溶性和热行为。采用扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察断裂表面和相形貌，以研究韧性机理。在纳米复合材料中观察到典型的核壳形态，ZrP 被 EMA-GMA 相包裹，这会引起塑性变形。该化合物的超韧效果主要是通过有效的界面相容性和通过EMA-GMA与PLA基体中的ZrP的协同作用实现的大规模剪切屈服变形来证实的。
更新日期：2019-11-19
中文翻译：
反应熔融共混制备超韧 PLA/EMA–GMA/ZrP 纳米复合材料的相形貌和性能
通过反应熔融共混方法将纳米填料磷酸锆（ZrP）和乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯共聚物（EMA-GMA）引入聚乳酸（PLA）中以提高其韧性。PLA/EMA-GMA/ZrP(82/15/3)纳米复合材料的冲击强度比纯PLA提高了约22倍，达到65.5 kJ/m 2。傅里叶变换红外光谱（FTIR）分析表明组分之间存在增容反应。通过动态机械分析（DMA）、差示扫描量热（DSC）和热重分析（TGA）研究了共混物的混溶性和热行为。采用扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察断裂表面和相形貌，以研究韧性机理。在纳米复合材料中观察到典型的核壳形态，ZrP 被 EMA-GMA 相包裹，这会引起塑性变形。该化合物的超韧效果主要是通过有效的界面相容性和通过EMA-GMA与PLA基体中的ZrP的协同作用实现的大规模剪切屈服变形来证实的。
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