聚苯乙烯/纳米铝复合材料的流变特性及纺丝研究  

Rheological and spinning properties of polystyrene/nano aluminum composites

作　　者：陈文姣[1] 谢芮[1] 罗雯利 刘才林[1] 彭碧辉[1] 杨海君[1] 任先艳[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《强激光与粒子束》2018年第4期36-41,共6页High Power Laser and Particle Beams

基　　金：西南科技大学人才项目(16zx7139)

摘　　要：为有效制得Z箍缩氘代聚苯乙烯/纳米铝(DPS/AlNPs)导电丝阵材料,采用PS中掺入AlNPs制备PS/AlNPs复合材料纤维进行模拟研究。研究了温度及剪切速率等因素对PS/AlNPs复合材料流变性能的影响、复合材料熔体的结构变化及流动状态与可纺性能的关系,以及PS/AlNPs纤维的形貌、热稳定性能和力学性能。结果表明:PS/AlNPs熔体属于典型剪切变稀型非牛顿流体,熔体的表观粘度与温度呈现负相关,240~260℃时复合材料的非牛顿指数介于0.462~0.546,结构黏度系数介于1.8~2.1,黏流活化能介于77.2~104.6kJ·mol-1,具有良好的可纺性。PS/AlNPs纤维表面光滑,对AlNPs粒子包覆良好且对其抗氧化非常有利,其中当AlNPs质量分数为1%时纤维的断裂伸长率突出、掺量为5%时其断裂强度较高。PS/AlNPs composite fibers were prepared by adding AlNPs into PS to finish the simulation study of conductive matrix materials for Z-pinch:deuterated polystyrene/nano-aluminum(DPS/AlNPs).The effects of temperature and shear rate on the rheological properties,the relationship between the structural changes,the flow condition of composites melt and the properties of PS/AlNPs,as well as the morphology,thermal stability and mechanical properties of PS/AlNPs fiber were investigated.The results show that the PS/AlNPs melt is a typical shear thinning non-Newtonian fluid,and the apparent viscosity of the melt is negatively correlated with the temperature.The composite possesses non-Newtonian index of between 0.462 and 0.546 at 240-260 ℃,the coefficient of viscosity of about 1.8 to 2.1,and the activation energy of viscous flow sitting between 77.2 and 104.6 kJ mol^(-1),showing its good spinnability.The PS shows its ability to coat AlNPs very well and prohibits the AlNPs being oxided,giving birth to a PS/AlNPs fiber possessing smooth surface.The fiber has the biggest elongation at break and the highest breaking strength when the content of AlNPs is 1% and 5%,respectively.

关 键 词：纳米铝 聚苯乙烯 流变性能 纺丝性能 复合纤维 

分 类 号：TB333[一般工业技术—材料科学与工程]