摘要
利用HAAKE转矩流变仪和毛细管流变仪研究了低密度聚乙烯(LDPE)/中相对分子质量聚异丁烯(PIB)和聚苯乙烯(PS)/PIB共混体系的流变行为,讨论了PIB含量对LDPE/PIB和PS/PIB共混体系的扭矩、剪切黏度、剪切应力及非牛顿指数(n)的影响结果表明明,随着w(PIB)的增加,共混体系的扭矩、剪切黏度下降,n增加,但仍为假塑性流体(n小于1)其中,进入平衡态后LDPE/PIB体系的扭矩从5.6 N·m降到4.5 N·m;PS/PIB体系的扭矩从3 2 N·m降到2.5
This paper studied the rheological behavior of low density polyethylene/medium relative molecular weight polyisobutylene （LDPE/PIB） blend and polystyrene/PIB （PS/PIB） blend by HAAKE torque rheometer and capillary rheometer. The influences of PIB content on torque, shear viscosity, shear stress and non-Newtonian index of the LDPE/PIB and PS/PIB blends with different composition were discussed. The results show that as the PIB content rises, the blends＇ torque, shear viscosity and shear stress decrease, whereas their non-Newtonian indexes increase, nevertheless they are still considered as pseudoplastic fluid （n〈1）. The torque of the LDPE/PIB and PS/PIB blends lowers from 5.6 N·m to 4.5 N·m and from 3.2 N·m to 2.5 N·m, respectively, when both blending systems enter into their equilibrium state.
出处
《合成树脂及塑料》
CAS
北大核心
2009年第1期39-42,共4页
China Synthetic Resin and Plastics
关键词
低密度聚乙烯
聚苯乙烯
中相对分子质量聚异丁烯
共混
流变行为
low density polyethylene
polystyrene
medium relative molecular weight polyisobutylene
blending
rheological behavior
