利用超临界CO<sub>2</sub>调控聚合物二元共混物的相形貌及力学性能

doi:10.11896/j.issn.1005-023X.2018.12.022

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Abstract The dominating influence of phase morphology onto the final properties of polymer blends is proverbial. We herein employed supercritical carbon dioxide (CO₂) as the solution to adjust the phase morphology of polypropy-lene (PP)/ethylene-propy-lene-diene monomer (EPDM) blends, whose mechanical behavior was studied by using dynamic mechanical analysis (DMA). The results showed that the CO₂ treatment, owing to the carbon dioxide’s solubility difference and swelling ratio difference in PP and EPDM matrices, could causes substantial increment of EPDM volume fraction, and in consequence, facilitates the transition of EPDM phase morphology in the polymer blends from an original sea-island structure to a co-continuous structure. The DMA test observed an inconspicuous performance change of the vacuum annealed blending material but definite storage modulus and loss modulus improvements of the supercritical CO₂ annealed PP/EPDM blends with the same EPDM content, indicating the promotion of both toughness and inflexibility.

Key words： polypropylene ethylene-propylene-diene monomer (EPDM) supercritical CO₂ annealing phase morphology mechanical property

Published: 20 July 2018

CLC number:

TQ325.1

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	Articles by authors
	YAN Haikuo
	ZHENG Xiaoping
	WANG Fan
	BAO Jinbiao
	WANG Shiwei

Cite this article:

YAN Haikuo,ZHENG Xiaoping,WANG Fan, et al. Adjusting Phase Morphology and Mechanical Properties of the Polymer Binary Blends by Supercritical CO₂[J]. Materials Reports, 2018, 32(12): 2057-2061.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.12.022 OR http://www.mater-rep.com/EN/Y2018/V32/I12/2057

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