Adjusting Phase Morphology and Mechanical Properties of the Polymer Binary Blends by Supercritical CO2
YAN Haikuo1, ZHENG Xiaoping1, WANG Fan1, BAO Jinbiao1, WANG Shiwei2
1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211; 2 National Center for International Research of Micro-nano Molding Technology & Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou 450001
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.
闫海阔,郑晓平,王璠,包锦标,王市伟. 利用超临界CO2调控聚合物二元共混物的相形貌及力学性能[J]. 《材料导报》期刊社, 2018, 32(12): 2057-2061.
YAN Haikuo, ZHENG Xiaoping, WANG Fan, BAO Jinbiao, WANG Shiwei. Adjusting Phase Morphology and Mechanical Properties of the Polymer Binary Blends by Supercritical CO2. Materials Reports, 2018, 32(12): 2057-2061.
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2018, Vol. 32 
