GO/TLCP/PF混杂复合材料的热性能和动态力学性能  

Thermal and Dynamic Mechanical Properties of GO/TLCP/PF Hybrid Composites

作　　者：徐伟华[1] 韦春[1] 吕建[1] 苏乐[1] 曾思华[1] 

机构地区：[1]桂林理工大学材料科学与工程学院有色金属及材料加工新技术教育部重点实验室,桂林541004

出　　处：《材料研究学报》2013年第2期163-166,共4页Chinese Journal of Materials Research

基　　金：国家自然科学基金51163003;21264005和51263005资助项目~~

摘　　要：采用熔融挤出法将热致性液晶聚合物(TLCP)与酚醛树脂(PF)熔融挤出,分别加入氧化石墨烯(GO)、KH550改性GO(KH550-GO)、KH560改性GO(KH560-GO),制备出GO/TLCP/PF混杂复合材料,研究GO的加入对GO/TLCP/PF混杂复合材料的热性能、力学性能、动态力学性能、蠕变和应力松弛的影响。结果表明:GO的加入可提高GO/TLCP/PF混杂复合材料的热性能、力学性能以及动态力学性能;仅加入1%KH560改性的GO,GO/TLCP/PF混杂复合材料的冲击强度比PF复合材料提高了25.6%,储能模量提高了28.1%,蠕变和应力松弛性能也得到改善。其原因是,GO与TLCP具有一定的协同增强效应。Thermotropic liquid crystal polymer （TLCP） and phenol formaldehyde （PF） firstly were prepared through melting extrusion methods, then Graphene oxide （GO） which synthesized by a modified Hummers method, GO which modified by silane coupling agent KH550 and KH560 were added to the matrix TLCP） and PF, respectively, the GO/TLCP/PF hybrid composites were prepared. The thermal properties, mechanical properties, dynamic mechanical thermal analysis, creep and stress relaxation behavior of GO/TLCP/PF hybrid composites were investigated. The results show that the properties of GO/TLCP/PF hybrid composites were obviously improved. The impact strength and the storage modulus of GO/＇TLCP/PF hybrid composites, GO modified by silane coupling agent KH560, are increased by 25.6% and 28.1%, respectively. Creep and stress relaxation performance has also been improved.

关 键 词：复合材料 氧化石墨烯 热致性液晶 酚醛树脂 硅烷偶联剂 混杂复合材料 动态力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]