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<p>The thermal expansion coefficient of the polymer/graphene platelet (GPL)/aligned short glass fiber (GF) nanocomposites is evaluated by means of a nested micromechanics method. First, the Halpin–Tsai, rule of mixture and Chow micromechanics models are used to predict the effective properties of the GPL-filled polymer material. Then, considering the glass fiber as the reinforcement and GPL/polymer as the matrix, the Mori–Tanaka model is used to calculate the longitudinal and transverse thermal expansion coefficient of polymer/GPL/GF nanocomposites. To show the accuracy of the micromechanical models, some comparative studies are performed between the present predictions and other results available in the literature. Some parametric studies are made to depict the effect of microstructural factors including the volume fraction of both reinforcements, and fiber aspect ratio. The results show the uniform dispersion of GPLs within the polymer matrix can significantly decrease the transverse thermal expansion coefficient of the hybrid nanocomposite. In order to evaluate the thermal expanding properties of various types of hybrid nanocomposites, the micromechanical approach presented in this research can be employed.</p>

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Thermal expansion predictions for graphene/short glass fiber/polymer hybrid nanocomposites using a two-phase micromechanical approach

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Yongai Sun,
  • Xiaowei Fan,
  • Hao Yu

摘要

The thermal expansion coefficient of the polymer/graphene platelet (GPL)/aligned short glass fiber (GF) nanocomposites is evaluated by means of a nested micromechanics method. First, the Halpin–Tsai, rule of mixture and Chow micromechanics models are used to predict the effective properties of the GPL-filled polymer material. Then, considering the glass fiber as the reinforcement and GPL/polymer as the matrix, the Mori–Tanaka model is used to calculate the longitudinal and transverse thermal expansion coefficient of polymer/GPL/GF nanocomposites. To show the accuracy of the micromechanical models, some comparative studies are performed between the present predictions and other results available in the literature. Some parametric studies are made to depict the effect of microstructural factors including the volume fraction of both reinforcements, and fiber aspect ratio. The results show the uniform dispersion of GPLs within the polymer matrix can significantly decrease the transverse thermal expansion coefficient of the hybrid nanocomposite. In order to evaluate the thermal expanding properties of various types of hybrid nanocomposites, the micromechanical approach presented in this research can be employed.