新型混炼组件加工聚合物混合性能模拟对比

摘要

Polymer mixing properties processed by two kinds of novel blending subassembly,namely composite subassemblyand barrier subassembly were simulated and compared through using Polyflow as polymer fluid dynamic software and polycarbonate (PC) as simulating material. The results show that flow field of composite subassembly and barrier subassembly is mainly tensile action,and maximum tensile strength of flow field in composite subassembly is higher than that in barrier subassembly. Maximum shearing rate in flow field of composite subassembly is relatively small and mainly concentrated in the region of smaller than 400 s-1. In the region of larger than 400 s-1,shearing strength of flow field in barrier subassembly is higher slightly than that in composite subassembly. Distribution mixing performance in composite subassembly and barrier subassembly is similar,tensile action and dispersive mixing effect in barrier subassembly are stronger than those in composite subassembly,and mixing efficiency in composite subassembly is better than that in barrier subassembly.%以聚碳酸酯(PC)为模拟材料，分别采用复合组件和屏障组件，应用聚合物流体动力学软件Polyflow，对这两种新型混炼组件加工聚合物的混合性能进行模拟与对比分析。结果表明，复合组件和屏障组件的流场都以拉伸作用为主，复合组件内流场的最大拉伸强度要高于屏障组件；复合组件流场中粒子受到的最大剪切速率相对比较小，最大剪切速率主要集中在小于400 s-1的区域，在最大剪切速率大于400 s-1的区域，屏障组件内流场受到的剪切作用强度要略高于复合组件；复合组件和屏障组件的分布混合性能相差不大，屏障组件对物料的拉伸作用要强于复合组件，分散混合效果更好，复合组件对物料的混合效率要好于屏障组件。