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77.2~104.6 kJ·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.
Abstract:
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 proper-ties 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 break-ing strength when the content of AlNPs is 1 % and 5 %,respectively.
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