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Facile fabrication of graphene oxide/poly(styrene-co-methyl methacrylate) nanocomposite with high toughness and thermal stability
Materials Today Communications ( IF 3.8 ) Pub Date : 2020-09-09 , DOI: 10.1016/j.mtcomm.2020.101633
Saadman Sakib Rahman , Muhammad Arshad , Muhammad Zubair , Morteza Ghasri-Khouzani , Ahmed Qureshi , Aman Ullah

Graphene and related nanomaterial-based polymer composites have shown the potential to resolve the long-standing conflict between strength and toughness, the two vital mutually exclusive mechanical properties. The uniform dispersion of the nanofillers in polymer matrices to attain strong matrix-filler interfacial bonding, which is essential for effective load transfer between the polymer matrix and fillers, is the least investigated aspect and a major challenge in composite engineering. Copolymeric materials can be exploited to enhance the distribution of nanofillers. Herein the optimization of monomer ratios of the poly (styrene-co-methyl methacrylate) copolymer and a facile method to fabricate graphene oxide (GO) reinforced nanocomposites using in situ bulk copolymerization are reported. The ultimate tensile strength, failure strain, and storage modulus of the injection molded copolymer were increased by 14.6, 15, and 43%, respectively, by adding only 0.1 wt.% GO. Also, the thermogravimetric analysis revealed that the thermal stability of the nanocomposite is much better than the neat copolymer. Crack arresting mechanism and dispersion state of GO sheets in the copolymer matrix were also investigated using scanning and transmission electron microscopes. Thus, this paper provides a methodology for uniform dispersion of GO in copolymeric materials to attain high toughness and thermal stability.



中文翻译:

易于制备具有高韧性和热稳定性的氧化石墨烯/聚(苯乙烯-甲基丙烯酸甲酯共​​聚物)纳米复合材料

石墨烯和相关的基于纳米材料的聚合物复合材料已显示出解决强度和韧性(这两个至关重要的互斥机械性能)之间长期存在的冲突的潜力。纳米填料在聚合物基体中的均匀分散以实现牢固的基体-填料界面键是聚合物基体和填料之间有效载荷转移的基础,是研究最少的方面,也是复合工程中的主要挑战。可以利用共聚材料来增强纳米填料的分布。本文报道了聚(苯乙烯-共-甲基丙烯酸甲酯)共聚物的单体比例的优化和使用原位本体共聚合制备氧化石墨烯(GO)增强的纳米复合材料的简便方法。极限抗拉强度,破坏应变,通过仅添加0.1重量%的GO,注射成型的共聚物的储能模量和储能模量分别增加了14.6、15和43%。而且,热重分析表明,纳米复合材料的热稳定性比纯共聚物好得多。还使用扫描和透射电子显微镜研究了GO片材在共聚物基质中的止裂机理和分散状态。因此,本文提供了将GO均匀分散在共聚材料中以获得高韧性和热稳定性的方法。还使用扫描和透射电子显微镜研究了GO片材在共聚物基质中的止裂机理和分散状态。因此,本文提供了将GO均匀分散在共聚材料中以获得高韧性和热稳定性的方法。还使用扫描和透射电子显微镜研究了GO片材在共聚物基质中的止裂机理和分散状态。因此,本文提供了将GO均匀分散在共聚材料中以获得高韧性和热稳定性的方法。

更新日期:2020-09-10
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