【摘要】 采用毛细管流变仪测试了聚酰胺6/热塑性聚氨酯（PA6/TPU）共混物的表观黏度、非牛顿指数等流变参数,讨论了剪切速率和温度对熔体表观黏度、剪切应力的影响。结果表明,PA6 和 PA6/TPU 共混物的表观黏度随着温度和剪切速率的增大而减小,非牛顿指数均小于1,符合假塑性流体的流动规律;PA6/TPU 共混物的表观黏度比PA6 的高,而其非牛顿指数比 PA6 的小,说明共混物的非牛顿性增强。在温度为230～250℃、剪切速率为100～1200s^-1时,共混物的表观黏度为100～900 Pa·S,共混物适合挤出成型和注射成型。更多还原

【Abstract】 The rheological behavior of polyamide 6/thermoplastic polyurethane（PA6/TPU）blends was studied.The results showed that the apparent viscosity of PA6 and PA6/TPU blends decreased with increasing of the temperature and share rate.Non-Newtonian index is less than 1,which corresponds to pseudoplastic flow characteristics.The apparent viscosity of PA6/TPU blends is higher,non-Newtonian index is lower than that of PA6,respectively.In temperature range between 230℃ and 250℃,shear rate range between 100 s^-1and 1200 s^-1,the apparent viscosities of the blends were between 100 Pa·s and 900 Pa·s,which confirms that the blends are suitable for extrusion and injection molding.更多还原