Effects of Relative Molecular Weight of TLCP on the Wear and Thermal Properties of TLCP/UP/GF in-situ Hybrid Composites
In order to overcome the brittleness and weak cracking resistance of unsaturated polyester resin (UP) modified by glass fiber and to develop more various applications, in-situ hybrid composites of thermotropic liquid crystalline polymer (TLCP), unsaturated polyester (UP) and glass fiber (GF) were prepared by melt mixing technology. Furthermore the thermal stability and the ring-on-block wear properties of the TLCP/GF/UP composites had been studied using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and wear test machine. The results showed the wear resistance of hybrid composites increased significantly with increasing TLCP relative molecular weight (n) (n means number of repeat structure unit) even though introducing TLCP at relatively low level (5wt％). Moreover, the thermal stability due to the presence of curing network was optimal by appending appropriate relative molecular weight (n=10) of TLCP. The Worn surface was observed by scanning electron microscopy (SEM) and the mechanism for the improvement was discussed in this paper.
Thermotropic liquid crystalline polymer Unsaturated polyester In-situ hybrid composites Wear and Thermal properties
LU Chihua WEI Chun XU Deng LV Jian
Key laboratory of new processing technology for nonferrous metals and materials, Ministry of Education, Guilin University of Technology, Guilin 541004, P. R. China
国际会议
上海
英文
464-466
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）