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首页> 外文期刊>Journal of Applied Polymer Science >Encapsulated phase structure and morphology evolution during quiescent annealing in ternary polymer blends with PA6 as matrix
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Encapsulated phase structure and morphology evolution during quiescent annealing in ternary polymer blends with PA6 as matrix

机译：以PA6为基质的三元共混聚合物静态退火过程中的包封相结构和形貌演变

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摘要

This work is aim to study the encapsulated morphology development in ternary blends of polyamide 6/high density polyethylene/maleic anhydride-grafted-ethylene propylene diene monomer (PA6/HDPE/EPDM-g-MA) and polyamide 6/maleic anhydride-grafted-high density polyethylene/ethylene propylene diene monomer (PA6/HDPE-g-MA/EPDM) through thermodynamically control described by Harkins spreading theory. The phase morphology was confirmed by using scanning electron microscope (SEM) and selective solvent extraction revealed that PA6/HDPE/EPDM-g-MA blend having a composition of 70/15/15 vol % is constituted of polyamide 6 matrix with dispersed composite droplets of HDPE subinclusions encapsulated by EPDM-g-MA phase, while for PA6/HDPE-g-MA/EPDM blend with the same composition is constituted of polyamide 6 matrix with dispersed composite droplets of HDPE-g-MA subinclusions encapsulated by EPDM phase. Quiescent annealing test revealed that for PA6/HDPE/EPDM-g-MA blend, a perfect core-shell structure with one HDPE particle encapsulated by EPDM-g-MA phase was formed during annealing, and for PA6/HDPE-g-MA/EPDM blend, a novel complete inverting HDPE-g-MA/EPDM core/shell structure was achieved. Moreover, quantitative analysis about coalescent behaviors of HDPE-g-MA and HDPE subinclusions during quiescent annealing were investigated by image analysis and the result suggested that the grafted maleic anhydride group in HDPE-g-MA, acted as a role of steric repulsion, could suppress coalescence effects, thus leaded to a lower coalescent rate than that of HDPE subinclusions.
机译：这项工作旨在研究聚酰胺6 /高密度聚乙烯/马来酸酐接枝的乙烯丙烯二烯单体（PA6 / HDPE / EPDM-g-MA）和聚酰胺6 /马来酸酐接枝的三元共混物的封装形态发展。高密度聚乙烯/乙烯丙烯二烯单体（PA6 / HDPE-g-MA / EPDM）通过Harkins扩散理论描述的热力学控制。通过使用扫描电子显微镜（SEM）确认相形态，并通过选择性溶剂萃取发现，组成为70/15/15 vol％的PA6 / HDPE / EPDM-g-MA共混物由具有分散的复合液滴的聚酰胺6基质组成EPDM-g-MA相包裹的HDPE子夹杂物的组成，而对于相同组成的PA6 / HDPE-g-MA / EPDM共混物则由聚酰胺6基质组成，而HDDM-g-MA包裹体的复合液滴分散在EPDM相中。静态退火测试表明，对于PA6 / HDPE / EPDM-g-MA共混物，在退火过程中形成了一个完美的核壳结构，其中一个HDPE颗粒被EPDM-g-MA相包裹，而PA6 / HDPE-g-MA / EPDM共混物是一种新颖的完整的反相HDPE-g-MA / EPDM核/壳结构。此外，通过图像分析对HDPE-g-MA和HDPE夹杂物在静态退火过程中的聚结行为进行了定量分析，结果表明，HDPE-g-MA中的接枝马来酸酐基团起空间排斥作用抑制聚结作用，因此导致聚结率低于HDPE次夹杂物。

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