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Title: Elastomer modified polypropylene-polyethylene blends as matrices for wood flour-plastic composites

Source: Composites Part A, 41 (2010) 1559-1569. doi:10.1016/j.compositesa.2010.07.002; 2010

Author(s)Clemons, Craig

Publication Year: 2010  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-2A

Abstract: Blends of polyethylene (PE) and polypropylene (PP) could potentially be used as matrices for wood-plastic composites (WPCs). The mechanical performance and morphology of both the unfilled blends and wood-filled composites with various elastomers and coupling agents were investigated. Blending of the plastics resulted in either small domains of the minor phase in a matrix of major phase or a co-continuous morphology if equal amounts of HDPE and PP were added. The tensile moduli and yield properties of the blends were clearly proportional to the relative amounts of HDPE and PP in the blends. However, the nominal strain at break and the notched Izod impact energies of HDPE were greatly reduced byadding as little as 25% of the PP. Adding an ethylene-propylene-diene (EPDM) elastomer to the blends, reduced moduli and strength but increased elongational properties and impact energies, especially in HDPE-rich blends. Adding wood flour to the blends stiffened but embrittled them, especially the tougher, HDPE-rich blends, though the reductionsin performance couldbe offset somewhatby adding elastomers and coupling agents or a combination of both.

Keywords: Polyethylene, wood flour, fiber-reinforced plastics, cellulose fibers, composite materials, mechanical properties, polypropylene, fillers, fibrous composites, wood utilization, wood-plastic composites, modulus of elasticity, elasticity, flexure, bending, elastomers, recycling, thermoplastic composites, wood-plastic materials, polymers, polymerization, composites materials, strength, HDPE, high density polyethylene, tensile strength, bending strength, coupling agents, thermoplastic resin, wood

Publication Review Process: Formally Refereed

File size: 2 kb(s)

Date posted: 10/17/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 40120
Current FPL Scientist associated with this product
Clemons, Craig M.
Materials Research Engineer

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