Evolution of iPP/HDPE Morphology under Different Mold Temperatures via Multiflow Vibration Injection Molding: Thermal Field Simulation and Oriented Structures,Industrial & Engineering Chemistry Research

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Evolution of iPP/HDPE Morphology under Different Mold Temperatures via Multiflow Vibration Injection Molding: Thermal Field Simulation and Oriented Structures
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-25 , DOI: 10.1021/acs.iecr.0c00097
Xuanbo Gu ₁ , Rui Hong ₁ , Jie Leng ₁ , Menglong Hu ₁ , Qiang Fu ₁ , Jie Zhang ₁

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To date, many advanced polymer processing technologies have been developed to tune the morphology of semicrystalline polymers, such as multiflow vibration injection molding (MFVIM). By adjusting the processing fields, i.e., shear and thermal fields, the material can be imparted with great mechanical properties, good electrical/thermal conductivity, or biomimic structure, by manipulating chain’s orientation, crystal’s arrangement, or hierarchical structure distribution. Despite the era of intelligent manufacturing approaching, there is rarely any report on the computer simulation of these advanced processing technologies. In this work, the processing fields of the MFVIM isotactic polypropylene/high-density polyethylene (iPP/HDPE) part are successfully simulated using Moldflow by designing a special model. Different thermal gradients can be realized in the plate part by setting different mold temperatures. The experimental results correlate well with the simulation results, and both of them illustrate that the mold temperature plays an important role in the morphology of dispersed PE phase resulting in different physical properties.

中文翻译：

多模振动注射成型在不同模具温度下iPP / HDPE形态的演变：热场模拟和定向结构

迄今为止，已经开发了许多先进的聚合物加工技术来调节半结晶聚合物的形态，例如多流振动注射成型（MFVIM）。通过调节加工场，即剪切场和热场，可以通过操纵链的方向，晶体的排列或分层结构分布，为材料赋予出色的机械性能，良好的电/导热性或仿生结构。尽管进入了智能制造时代，但很少有关于这些先进处理技术的计算机仿真的报告。在这项工作中，通过设计特殊模型，使用Moldflow成功地模拟了MFVIM等规聚丙烯/高密度聚乙烯（iPP / HDPE）零件的加工领域。通过设置不同的模具温度，可以在板件中实现不同的热梯度。实验结果与模拟结果吻合良好，并且两者都表明模具温度在分散的PE相的形态中起着重要作用，从而导致不同的物理性能。

更新日期：2020-03-26

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