Enhanced thermal and mechanical properties of polyimide composites by mixing thermotropic liquid crystalline epoxy grafted aluminum nitride
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- 作者：Zihai He ; Wen Dai ; Jinhong Yu ; Lulu Pan ; Xiane Xiao…
- 关键词：Thermotropic liquid crystalline epoxy ; Aluminum nitride (AlN) ; PI composites ; Thermal properties
- 刊名：Journal of Polymer Research
- 出版年：2014
- 出版时间：November 2014
- 年：2014
- 卷：21
- 期：11
- 全文大小：2,172 KB
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文摘
In this paper, we have fabricated thermotropic liquid crystalline with epoxy groups grafted AlN nanoparticles (LCE-g-AlN) and then incorporated these into polyimide (PI) matrix to obtain the composites. The structure of LCE-g-AlN was charactered by Fourier-transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analyses (TGA), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The morphology and thermal properties of composites were systematically investigated. The morphology of the PI/LCE-g-AlN composites performed by scanning electron microscopy (SEM) indicating a homogeneous distribution of LCE-g-AlN nanoparticles in the PI matrix. Moreover, the value of Young’s modulus and tensile strength of the PI composites was increased by 78.3?% and 22.7?% in comparison with neat PI, respectively. The value of storage modulus of the PI composites achieved 7897?MPa with the incorporation of 10?wt.%, which increase 159.6?% compared with the neat PI (3035?MPa).