【摘要】 测定了动态硫化再生胶(RR)/低密度聚乙烯(LDPE)共混物的流变曲线、挤出胀大值和粘度等,讨论了并用比、温度、交联剂用量、返炼次数等因素的影响,评价了共混物的加工性能。结果表明,共混物属假塑性流体,服从指数定律,流动指数n值为0.18—0.42。其表现粘度的绝对值低于按线性共混规则预测的粘度。挤出胀大值较小,可在一般塑料加工设备上进行挤出、模压和注射成型。更多还原

【Abstract】 The effect of reclaimed rubber /low density polyethylene (RR/LDPE) mass ratio and mixing temperature on the rheological curve, extrudate swell, melt fracture and extrudate appearance of the dynamically vulcanized RR/LDPE thermoplastic elastomers was studied, and the effect of the curing agent dosage and the times of repeated mixing operations on the viscosity of the RR/LDPE thermoplastic elastomers was investigated.The results show that the RR/LDPE thermoplastic elastomer is a false plastic material which is obediant to the law of exponent, with the flow index values being within the range of 0.18-0.42.The absolute value of apparent viscosity is lower than the viscosity predicted by the rule of linear blending.The extrudate swell is relatively small and this thermoplastic elastomer can be processed by compression molding, injection molding extrusion on the conventional thermoplastics processing machine.更多还原