Preparation and mechanical properties of TLCP/UP/GF in-situ hybrid composites

来源期刊:中国有色金属学报(英文版)2006年第z1期

论文作者:于贤保 韦春 陆绍荣 虞锦洪 徐灯 卢炽华

文章页码:529 - 533

Key words:thermotropic liquid crystalline polymer; in-situ hybrid composite; unsaturated polyester; mechanical properties

Abstract: One kind of novel reactive thermotropic liquid crystalline polymer-methacryloyl copolymer (LCMC) containing polyester mesogenic units was synthesized. Its structure, morphology and properties were investigated systemically by Ubbelohde viscometer, differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffractometry (WAXD) and polarizing optical microscopy (POM). The results indicate that it is one kind of nematic thermotropic liquid crystal polymer (TLCP). The impact strength, bending strength and the morphologies of impact fracture surface of LCMC, unsaturated polyester (UP) and glass fiber (GF) in-situ hybrid composites were studied by Izod impact tester, universal testing machine and scanning electron microscopy (SEM), respectively. The results show that the impact and bending strength of composites containing LCMC are improved, especially the composites containing 5% LCMC increases most obviously. These results with SEM results reveal that LCMC plays an important role in the improvement of interfacial adhesive between matrix and fiber.

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