Properties of Bismaleimides Composites With Hyperbranched Polysilane Grafted Graphene

Properties of Bismaleimides Composites with Hyperbranched Polysilane Grafted Graphene

Hongxia Yan[1],Yichen Feng, Junping Zhang, Tingting Li

Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'An, 710072, China

Abstract: Graphene is a kind of novel two-dimensional nanocomposite. the special single atomic layer structure gives it distinctive physical properties, such as excellent mechanical properties, good electrical and thermal conductivity properties, outstanding tribological property and so on. BMI resin is a high-performance material, which has been widely used in aerospace and electronic industries due to its outstanding thermal, mechanical, electrical, and tribological properties. However, pure BMI resin is brittle and has poor processing characteristic. Therefore, in this paper, graphene were used as filler to modify bismaleimide (BMI) which pre-polymer containing allyl phenyl ether and a low viscosity. To solve the problem of graphene's dispersion in BMI, graphene oxide are grafted by hyperbranched polysilane (HBPSi-GO), and The changes in GO surface morphology and chemistry conditions are characterized by Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The HBPSi-G/BMI composites are prepared by module casting method. The effect of content of HBPSi-GO on the mechanical properties and tribological properties of the composites are investigated, while the wearing mechanisms of the materials are also researched by SEM. The results show that, the suitable addition of HBPSi-GO can largely enhance both the mechanical properties and tribological properties of BMI resin. The severe wear of BMI resin is also converted from fatigued wear to adhesive wear with the addition of HBPSi-GO.

Key words: Graphene; Bismaleimide; Hyperbranched; polysilane; tribology; wear

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Corresponding author: Tel.: +86 2988431657; fax: +86 29 88431655.

E-mail: hongxiayan@nwpu.edu.cn

This work was financially supported by the Aerospace Science Foundation of China (2011ZF53064)

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