Encapsulated Phase Structure and Morphology Evolution During Quiescent Annealing in Ternary Polymer Blends with PA6 as Matrix
Encapsulated Phase Structure and Morphology Evolution During Quiescent Annealing in Ternary Polymer Blends with PA6 as Matrix
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以 PA6 为基体的三元聚合物共混物静态退火过程中的封装相结构和形态演化
DOI：
10.1002/app.39937
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发表时间：
2014-02-15
影响因子：
3
通讯作者：
Yang, Ming-bo
中科院分区：
文献类型：
--
作者：
Dou, Rui;Wang, Wei;Yang, Ming-bo
采用Harkins扩散理论对尼龙6/高密度聚乙烯/马来酸酐接枝三元乙丙橡胶（PA 6/HDPE/EPDM-g-MA）和尼龙6/马来酸酐接枝高密度聚乙烯/三元乙丙橡胶（PA 6/HDPE-g-MA/EPDM）三元共混物的包覆形态进行了研究。通过使用扫描电子显微镜（SEM）和选择性溶剂萃取证实相形态，表明具有70/15/15体积%组成的PA 6/HDPE/EPDM-g-MA共混物由聚酰胺6基体和分散的由EPDM-g-MA相包裹的HDPE子包裹体的复合液滴构成，而对于相同组成的PA 6/HDPE-g-MA/EPDM共混物，则是由EPDM相包覆的HDPE-g-MA亚包裹体的复合液滴分散在PA 6基体中构成。静态退火实验表明，PA 6/HDPE/EPDM-g-MA共混物在退火过程中形成了一种完整的核壳结构，即HDPE颗粒被EPDM-g-MA相包覆;而PA 6/HDPE-g-MA/EPDM共混物在退火过程中形成了一种新型的完全反转的HDPE-g-MA/EPDM核壳结构。此外，通过图像分析定量分析了HDPE-g-MA和HDPE子包裹体在静态退火过程中的聚结行为，结果表明，HDPE-g-MA中的接枝马来酸酐基团起空间排斥作用，抑制了聚结效应，导致聚结速率低于HDPE子包裹体。(c)2013 Wiley Periodicals，Inc. J.应用聚合物Sci. 2014，131，39937。
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. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39937.