PA56/PA6共混体系热性能及流变性能研究Study on the Thermal And Rheological Properties of PA56/PA6 Blends
钱思琦,朱瑞淑,张瀚誉,石禄丹,王学利,刘修才
QIAN Si-qi,ZHU Rui-shu,ZHANG Han-yu,SHI Lu-dan,WANG Xue-li,LIU Xiu-cai
摘要(Abstract)：
利用熔融共混的方法制备了PA56/PA6共混物,并采用DSC、TG及毛细管流变仪研究了不同比例PA56和PA6共混后体系的热性能以及流变性能,旨在为纺丝生产工艺条件控制提供一定理论依据。结果表明:加入少量PA56,共混体系的熔点和热分解温度与PA6相比差别不大,但是共混体系的熔融焓和结晶度明显下降。PA56/PA6共混体系为非牛顿假塑性流体,其表观黏度随剪切速率的增大而减小;随着PA56组分的增加,PA56/PA6熔体非牛顿指数呈现上升趋势,黏流活化能明显下降,PA56/PA6体系中PA56可以起到润滑作用,PA56的加入能够提高PA6基体的流动性,从而改善材料的加工性能。
PA56/PA6 blends were prepared by melting blending.DSC,TG and RH2000 capillary rheometer were used to study the thermal properties and rheological properties of the mixed PA56 and PA6 with different proportions,in order to provide a theoretical basis for the control of spinning process conditions.The results show that the melting point and thermal decomposition temperature of a small amount of PA56 is not different from that of PA6,but the melting enthalpy and crystallinity of PA56/PA6 blend system decrease obviously.The blend system of PA56/PA6 is a non-newtonian pseudoplastic fluid,and its apparent viscosity decreases with the increase of shear rate.With the increase of PA56 component,the non-newtonian index of PA56/PA6 presents an upward trend,and the viscous flow activation energy has an obvious decline.PA56 in PA56/PA6 system can play a lubricating role,and the addition of PA56 can improve the fluidity of PA6 matrix,thus improving the processing performance of the material.
关键词(KeyWords)：
PA6;PA56;共混;热性能;流变性能
PA6;PA56;blending;thermal property;rheological property
基金项目(Foundation): 国家重点研发计划项目(2017YFB0309400)
作者(Author):
钱思琦,朱瑞淑,张瀚誉,石禄丹,王学利,刘修才
QIAN Si-qi,ZHU Rui-shu,ZHANG Han-yu,SHI Lu-dan,WANG Xue-li,LIU Xiu-cai
DOI: 10.16090/j.cnki.hcxw.2020.08.003
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