Compatibilizing and Toughening Bamboo Flour-Filled HDPE Composites:Mechanical Properties and Morphologies
Introduction Much attention has been focused on the toughening of PE-or PP-wood composites with various polyolefinic elastomers or their maleated counterparts, such as SBR, styrene/ethylene-butylenes/styrene triblock copolymer (SEBS), ethylene/propylene/diene terpolymer (EPDM), ethylene/octene copolymer (EOR), ethylene/methyl acrylate copolymer (EMA), ethylene/butyl acrylate/glycidyl methacrylate copolymer (EBAGMA), and Surlyn ionomers. The strength and modulus of final composites were less improved or even decreased by the addition of elastomers alone, although the impact toughness was more or less improved, depending on the nature and content of elastomers used. Ethylene/propylene copolymer (EPR) is one of polyolefin-based thermoplastic elastomers. Its fully saturated backbone results in more excellent thermal, oxidative stability, and weatherability than conventional EPDM. Therefore, it has been widely used to enhance impact strength of virgin HDPE, PP, or PP-based composites filled with mineral fillers. Apart from the improved dispersion level of the fillers, functionalized EPR (e.g., MA group) could further promote the favorable core-shell encapsulation around them, which thus results in an increase in both filler-matrix adhesion and impact strength. To optimize the trade-off between stiffness/strength and toughness of final WPCs, the combination of elastomers with maleated polyolefins as combined modifiers has been reported. however, there is lack of further understanding on how the ratio between combined modifiers affects mechanical properties and fracture behaviors of final composites. The objectives of this study were to investigate morphologies and mechanical properties of HDPE-based composites filled with bamboo flour as influenced a) by the crystalline nature of maleated elastomer modifier in comparison with maleated PE; b) by the combined EPR-g-MA and PE-g-MA modifier systems, and c) by the loading rate of bamboo flour in the presence of combined modifiers.
Q.Wu Liu H. G.Han F.Yao Y.Kojima S.Suzuki
School of Renewable Natural Resources, LSU Agricultural Center, Baton Rouge, LA, USA College of Material Science and Engineering, Northeast Forestry University, Harbin, China Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529,Japan
国际会议
International Symposium on Wood Science and Technology(IAWPS 2008)(国际木材产品学会联合会2008学术研讨会)
哈尔滨
英文
513-514
2008-09-27（万方平台首次上网日期，不代表论文的发表时间）