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首页> 外文期刊>Journal of Applied Polymer Science >Effects of Processing Conditions on Foaming Behaviors of Polyetherimide (PEI) and PEI/Polypropylene Blends in Microcellular Injection Molding Process
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Effects of Processing Conditions on Foaming Behaviors of Polyetherimide (PEI) and PEI/Polypropylene Blends in Microcellular Injection Molding Process

机译：加工条件对微孔注塑工艺中聚醚酰亚胺（PEI）和PEI /聚丙烯共混物起泡行为的影响

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摘要

Foaming behaviors of both neat polyetherimide (PEI) and PEI/polypropylene (PP) blends were studied in this article in microcellular injection molding (Mucell) process. The study mainly focused on the comparison of two materials' foaming behaviors under different processing conditions which took a critical effect on the morphologies of foams. The results indicated that the different characteristics of PEI and PEI/PP blends, such as melt strength, gas dissolvability, and solubility, induced different nucleation ability of PEI and PEI/PP blends. The addition of PP could obviously improve the cell density and reduce the cell size. With the processing conditions changing, the morphologies of PEI/PP altered more variously, and their distribution of cell density was wider. This suggested that foaming behaviors of PEI/PP blends was more flexible to be controlled by the processing conditions than neat PEI. The effects of shot size, gas injection, and injection rate on foam morphologies were studied in detail. Shot size determined the weight reduction of samples and affected the cell density and size significantly. Gas dosing time and dosing rate determined the gas ratio which effected on foam morphologies of the PEI and PEI/PP foams. (C) 2014 Wiley Periodicals, Inc.
机译：本文在微孔注射成型（Mucell）过程中研究了纯聚醚酰亚胺（PEI）和PEI /聚丙烯（PP）共混物的发泡行为。该研究主要集中在两种材料在不同加工条件下的起泡行为的比较上，这对泡沫的形态具有至关重要的影响。结果表明，PEI和PEI / PP共混物的不同特性，如熔体强度，气体溶解性和溶解度，引起了PEI和PEI / PP共混物的不同成核能力。 PP的添加可以明显改善细胞密度并减小细胞大小。随着加工条件的变化，PEI / PP的形貌变化更加多样，其细胞密度分布更宽。这表明PEI / PP共混物的发泡行为比纯PEI更灵活，可通过加工条件进行控制。详细研究了注射量，气体注入和注入速率对泡沫形态的影响。注射量决定了样品的重量减少，并显着影响了细胞密度和大小。气体加料时间和加料速度决定了影响PEI和PEI / PP泡沫的泡沫形态的气体比例。 （C）2014威利期刊公司

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