(739h) 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