PBT复合材料的剪切稠化现象  

Shear-Thickening of PBT Composites

作　　者：施勇晖[1] 张朝 戴干策[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2008年第4期520-523,共4页Journal of East China University of Science and Technology

摘　　要：当PBT(聚对苯二甲酸丁二醇酯)中加入PTW(乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯共聚物)和GF(玻璃纤维)后,在较低的剪切速率下都可以观察到剪切稠化现象。但两者产生稠化的机理不同:PBT/PTW体系中剪切稠化具有较好的可逆性;而PBT/GF体系中稠化只是初始的相形态引起的粘度变化,当玻璃纤维的取向调整到与流动方向一致时,不会有稠化产生。实验还发现:当PTW和GF同时加入PBT中,剪切稠化现象也会变弱。When PTW （ethylene-butyl acrylate-GMA copolymer） or GF （glass fiber） was added to the PBT（polybutylene terephthalate） resin, the shear-thickening can be observed at the lower shear rate,while their mechanisms are different. The shear thickening in the PBT/PTW is reversible; but in the PBT/GF , it depended on the initial morphology of the glass fiber. When the GF oriented to the flow direction, the shear-thickening vanished. If both PTW and GF were added to the PBT, the shear-thickening declined.

关 键 词：剪切稠化 PBT PTW 玻璃纤维 流变性能 

分 类 号：TQ327.11[化学工程—合成树脂塑料工业]