Correlation between microstructure and properties of graphene oxide/waterborne polyurethane composites investigated by positron annihilation spectroscopy
作者： Xiaobing Han , Jie Gao , Zhiyuan Chen , Xiuqin Tang , Yuan Zhao
DOI: 10.1039/D0RA05872F
关键词:
摘要: A quantitative description of microstructure is highly desirable for the precise construction high performance graphene based polymer composites. In this paper, effects doping oxide (GO) on microstructure, thermal and mechanical properties obtained oxide/waterborne polyurethane (GO/WPU) composites were systematically investigated. order to give a deep insight into GO/WPU composites, especially relative free volume fraction (fr) interfacial interaction intensity (β), positron annihilation lifetime spectroscopy (PALS) was employed its characterization. With increase GO content, fr decreased first then increased, lowest value observed containing 0.5 wt% GO. This can be ascribed change in dispersed state interactions, which agree well with results SEM. The correlation between established PALS results, values β good explanation variation glass transition temperature tensile strength, respectively.
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