Synergistic toughening effects of grafting modification and elastomer-olefin block copolymer addition on the fracture resistance of wood particle/polypropylene/elastomer composites

Shunmin Yi; Shihua Xu; Yue Li; Wentao Gan; Xin Yi; Wanyu Liu; Qingwen Wang; Haigang Wang; Rongxian Ou

Materials & Design (Nov 2019)

Synergistic toughening effects of grafting modification and elastomer-olefin block copolymer addition on the fracture resistance of wood particle/polypropylene/elastomer composites

Shunmin Yi,
Shihua Xu,
Yue Li,
Wentao Gan,
Xin Yi,
Wanyu Liu,
Qingwen Wang,
Haigang Wang,
Rongxian Ou

Affiliations

Shunmin Yi: Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China
Shihua Xu: Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China; School of Arts and Design, Wuyi University, Jiangmen 529020, China
Yue Li: Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China
Wentao Gan: Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China
Xin Yi: College of Materials and Energy, South China Agricultural University, Guangzhou 510642, PR China
Wanyu Liu: Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China
Qingwen Wang: College of Materials and Energy, South China Agricultural University, Guangzhou 510642, PR China
Haigang Wang: Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China; Corresponding authors.
Rongxian Ou: College of Materials and Energy, South China Agricultural University, Guangzhou 510642, PR China; Corresponding authors.

Journal volume & issue: Vol. 181

Abstract

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A novel wood particle/polypropylene/elastomer composites with good impact resistance and stiffness was prepared by adding elastomer-olefin block copolymer (OBC) and grafting maleic anhydride (MAH) on polypropylene/OBC blends. The grafted MAH greatly improved the interfacial interaction among polypropylene, OBC, and wood particle, resulting in an enhanced impact resistance, stiffness and dimensional stability of the resulting composites. The modified matrix and their composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, mechanical tests, and dynamic mechanical analysis. The results confirmed that with 60 wt% wood particles loading, the synergistic interactions between OBC blending and MAH grafting improved the impact strength of the MAH-grafted blends/wood particle composites by 49%, with stiffness comparable that of the MAH-grafted polypropylene/wood particle composites. The composites modified with MAH also revealed an enhanced interfacial adhesion among polypropylene, OBC, and wood particles, as evidenced by dimensional stability tests, dynamic mechanical analysis, and morphology observation. Keywords: Polymer-matrix composites, Graft modification, Interface, Fracture toughness, Plastic deformation

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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