Microstructure and viscoelastic behaviors of graphene/PMMA nanocomposites

2015 16th International Conference on Electronic Packaging Technology (ICEPT) Pub Date : 2015-09-03 DOI:10.1109/ICEPT.2015.7236533

Lan-Ying Zhang, Yangwei Zhang

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引用次数: 2

Abstract

The microstructure and viscoelastic behaviors of graphene filled poly(methyl methacrylate) nanocomposites (graphene/PMMA) have been investigated. The composites were prepared by in situ polymerization method with graphene weight fraction from 0.1 to 1 wt.%. The microstructures were observed by transmitted polarization microscope (TPM) and scanning electron microscope (SEM). The viscoelastic behaviors characterized by storage modulus and loss tangent were measured by dynamic nanoindentation method. The effects of graphene content and force frequency on the viscoelastic behaviors were studied and discussed according to the features of microstructures and mobility of molecular chains. The graphene nanosheets with an average diameter of about 8.6 micrometers are found to disperse homogeneously in the PMMA matrix. The interface between graphene and PMMA is strong and few defects are observed in the impact fracture surfaces of the composites. The results indicate that the microstructure and viscoelastic properties of PMMA polymer are significantly improved by adding a low content of graphene.

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石墨烯/PMMA纳米复合材料的微观结构和粘弹性行为

研究了石墨烯填充聚甲基丙烯酸甲酯纳米复合材料(石墨烯/PMMA)的微观结构和粘弹性行为。采用原位聚合法制备了石墨烯质量分数为0.1 ~ 1 wt.%的复合材料。采用透射偏光显微镜(TPM)和扫描电子显微镜(SEM)观察其微观结构。用动态纳米压痕法测量了材料的粘弹性，表征了材料的储存模量和损失切线。根据分子链的微观结构和迁移率特征，研究和讨论了石墨烯含量和力频率对粘弹性行为的影响。平均直径约8.6微米的石墨烯纳米片均匀地分散在PMMA基体中。石墨烯和PMMA之间的界面很强，复合材料的冲击断口几乎没有缺陷。结果表明，加入低含量的石墨烯后，PMMA聚合物的微观结构和粘弹性得到了显著改善。

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2015 16th International Conference on Electronic Packaging Technology (ICEPT)

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