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Encapsulated phase structure and morphology evolution during quiescent annealing in ternary polymer blends with PA6 as matrix
Author(s) -
Dou Rui,
Wang Wei,
Zhou Yan,
Gong Lei,
Yin Bo,
Yang Mingbo
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39937
Subject(s) - high density polyethylene , materials science , maleic anhydride , polyamide , composite material , polymer blend , polyethylene , polymer chemistry , polymer , copolymer
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. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39937.