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首页> 外文期刊>Journal of Applied Polymer Science >Poly(lactic acid)-layered silicate nanocomposites: The effects of modifier and compatibilizer on the morphology and mechanical properties
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Poly(lactic acid)-layered silicate nanocomposites: The effects of modifier and compatibilizer on the morphology and mechanical properties

机译：聚乳酸层状硅酸盐纳米复合材料：改性剂和增容剂对形貌和力学性能的影响

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摘要

Poly(lactic acid) (PLA) based nanocomposites were prepared to investigate the effects of types of nanoclays. Five different organically modified nanoclays (Cloisites((R))15A, 25A, and 30B, and Nanofils((R))5 and 8) were used. Two rubbery compatibilizers, ethylene-glycidyl methacrylate (E-GMA) and ethylene-butyl acrylate-maleic anhydride, were used in the nanocomposites as compatibilizer-impact modifier. The degree of clay dispersion, the chemical compatibility between the polymer matrix and the compatibilizers, and changes in the morphology and mechanical properties of the nanocomposites were investigated. The mechanical properties and the morphological studies showed that the interactions between the different compatibilizers and PLA resulted in different structures and properties; such that the dispersion of clay, droplet size of the compatibilizer, and tensile properties were distinctly dependent on the type of the compatibilizer. Compatibility between C25A, C30B, and E-GMA resulted in the best level of dispersion, leading to the highest tensile modulus and toughness among the compositions studied. In the mentioned nanocomposites, a network structure was formed owing to the high reactivity of the epoxide group of GMA towards the PLA end groups resulting in high impact toughness. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42553.
机译：制备了基于聚乳酸（PLA）的纳米复合材料，以研究纳米粘土类型的影响。使用了五种不同的有机改性的纳米粘土（Cloisites15A，25A和30B，以及Nanofils5和8）。在纳米复合材料中，使用了两种橡胶状增容剂，即甲基丙烯酸乙烯-缩水甘油酯（E-GMA）和乙烯丙烯酸丁酯-马来酸酐，作为增容剂-抗冲改性剂。研究了粘土分散程度，聚合物基体与增容剂之间的化学相容性以及纳米复合材料的形态和力学性能的变化。力学性能和形貌研究表明，不同的增容剂与聚乳酸之间的相互作用导致不同的结构和性能。因此，粘土的分散性，增容剂的液滴尺寸和拉伸性能明显取决于增容剂的类型。 C25A，C30B和E-GMA之间的兼容性导致最佳分散水平，从而在所研究的组合物中获得最高的拉伸模量和韧性。在所述的纳米复合材料中，由于GMA的环氧基团对PLA端基的高反应性，形成了网络结构，从而导致了高的冲击韧性。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42553。

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