UP/GF/TLCP原位混杂复合材料的力学性能与流变性能  

Studies on the Mechanical and Rheological Properties of UP/GF/TLCP Composites

作　　者：卢炽华[1] 吕建[1] 徐灯[1] 于贤保[1] 韦春[1] 

机构地区：[1]桂林工学院有色金属及材料加工新技术省部共建教育部重点实验室,广西桂林541004

出　　处：《高分子材料科学与工程》2008年第2期95-98,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50473060)

摘　　要：通过静态力学方法研究热致性液晶聚合物(TLCP)的含量对不饱和聚酯(UP)/玻璃纤维(GF)/TLCP原位混杂复合材料力学性能的影响,采用流变仪研究TLCP对材料流变性能的影响,采用扫描电镜(SEM)观察材料的冲击断面微观形貌。结果表明,TLCP含量对材料流变性能和力学性能有很大影响,当TLCP加入量为5%时,材料的流动性能最好,熔体流动速率(MFR)达到107.7 g/10 min,常温下材料的冲击强度达到5.23 kJ/m2,是未加TLCP材料的1.97倍,材料的弯曲强度由66.9 MPa提高到76.5 MPa,提高了14.3%。同时,材料的蠕变和应力松弛行为得到一定程度的改善。SEM观察表明,TLCP的加入对提高材料的断裂能具有一定的作用。Unsaturated polyester resin was modified by appending TLCP. Effects of TLCP content on the impact strength, bending strength, stress relaxation, creep behavior and rheological properties of UP/GF/TLCP composites were studied. Fracture surface of broken specimens were examined by SEM. The results show that the mechanical properties and rheological properties are greatly influenced by TLCP content. A melt flow rate of 107.7g/（ 10 min） was obtained with addition of 5% TLCP. Compared with those of unmodified system, inclusion of 5% TLCP leads to 14.3% increase in bending strength and the impact strength is enhanced to 1.97 times. Meanwhile, the behaviors of the stress relaxation and creep are improved to a great extend. SEM observation of the fracture surface of the impact specimen shows that the toughened fracture characters are revealed.

关 键 词：热致性液晶 不饱和聚酯 复合材料 力学性能 流变性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]