| Because the silicon rubber has better heat resistance but its mechanical properties are relatively poor. In this paper, the high-performance carbon fiber (CF) was used as a reinforcement, the silicone rubber (MVQ) as the matrix, and coupling agent as a compatilizer, prepared carbon fiber/rubber composite materials. The content of carbon fiber was determined by testing the mechanical and thermal properties. The effect of coupling agent on the compatibility between rubber and carbon fiber was studied by using as a compatilizer. The crosslinking structure and compatibility of the carbon fiber and rubber were analyzed by Fourier Transform Infrared Spectrometer（FTIR) and scanning electron microscope (SEM). The results show that the formula obtained best mechanical properties is 100 份 silicone rubber , 12 份 carbon fiber, and 2.5 份 KH-550. The best curing conditions for carbon fiber reinforced silicon rubber are at 175 ℃ under 10 MPa for 30 min. And further demonstrates that compatibility of carbon fiber treated with KH550 is better than no treatment and treated with Si69, with which silicone rubber mix by SEM and IR analysis. |
