分散相含量对乙烯-醋酸乙烯酯共聚物/聚丙烯原位微纤复合 材料微纤形态、结晶行为及流变和力学性能的影响

doi:10.11896/j.issn.1005-023X.2018.12.017

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Abstract A series of ethylene-vinyl acetate copolymer/polypropylene (EVA/PP) in-situ microfibrillar composites (MFCs) differed in dispersed phase (i.e. PP) content were prepared using a multistage stretching extruder with an assembly of laminating-multiplying elements (LMEs), and the products’ microfibers morphology, crystallization behaviors, mechanical and dynamic rheological performances were studied. The results showed that PP could form microfibers in situ in EVA, and more PP content would lead to obviously more large-diameter microfibers and higher storage modulus (G′) and loss modulus (G″) of the MFCs. The systems with PP contents below 10wt% were partially compatible, while the phase separation occurred in systems with PP contents over 10wt%. PP microfibers could enhance the tensile performance of EVA effectively, as the EVA/20wt%PP MFCs owned the maximum tensile strength of 16.71 MPa, which was 42.9% higher than that of pure EVA. We also observed an obstructive effect of PP microfibers on the crystallization behavior of EVA, which consequently attenuates the crystallinity of the MFCs.

Key words： microfiber morphology mechanical properties crystallization behavior rheological properties dispersed phase ethylene-vinyl acetate (EVA) copolymer polypropylene microfibrillar composites (MFCs)

Published: 20 July 2018

CLC number:

TQ325.1

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	Articles by authors
	ZHANG Tingting
	DONG Jiahao
	WANG Meng
	WEI Liangqiang
	QIN Shuhao

Cite this article:

ZHANG Tingting,DONG Jiahao,WANG Meng, et al. Dispersed Phase Content of Ethylene-vinyl Acetate Copolymer/Polypropylene (EVA/PP) In-situ Microfibrillar Composites (MFCs): Influences to Microfiber Morphology, Crystallization Behavior, Rheological and Mechanical Properties[J]. Materials Reports, 2018, 32(12): 2032-2037.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.12.017 OR http://www.mater-rep.com/EN/Y2018/V32/I12/2032

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