Mechanical properties of wood flour/recycled-thermoplastic-blends composites

Song Yongming, . and Wang Qingwen, . (2006) Mechanical properties of wood flour/recycled-thermoplastic-blends composites. [Proceedings Paper]

In this paper the mechanical properties of composites prepared from wood flour and thermoplastic blends were investigated. Thermoplastics mixtures of polypropylene PP and high-density polyethylene HDPE and polystrene PS virgin or recycled were mixed with wood flour in a high speed blender and then extruded by a special designed twin/single screw extruder system to form wood-flour/thermoplastic-blends composites WTBCs. Comparative studies were made to evaluate the effectiveness of the two modification methods of the thermoplastic blends the one of the addition of maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer SEBS-g-MAH as compatibilizer and the other of blend grafting of maleic anhydride MAH using dicumyl peroxide DCP as initiator by reactive extrusion. The results showed that the impact properties of WTCBs using SEBS-g-MAH as compatibilizer were better improved than that of the blend grafting. However adverse results were observed on the tensile and flexural properties of the corresponding WTBCs. The mechanical properties of WTCBs prepared from recycled plastic blends were poor to some extent than that from virgin plastic blends in general especially in elongation break. The morphology of WTCBs breaking section was analyzed by scanning electron microscopy SEM and the result showed that a good interfacial adhesion between wood flour and polymer and polymer matrix was observed with both of the two modification methods. However by blend grafting of adding DCP as initiator and MAH as monomer a better interfacial bonding between wood and plastic matrix was obtained than that of the addition of SEBS-g-MAH. Blend grafting can be considered as a potential way of increasing the interfacial compatibility of different plastics and between plastic blends and wood.

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Abstract

In this paper the mechanical properties of composites prepared from wood flour and thermoplastic blends were investigated. Thermoplastics mixtures of polypropylene PP and high-density polyethylene HDPE and polystrene PS virgin or recycled were mixed with wood flour in a high speed blender and then extruded by a special designed twin/single screw extruder system to form wood-flour/thermoplastic-blends composites WTBCs. Comparative studies were made to evaluate the effectiveness of the two modification methods of the thermoplastic blends the one of the addition of maleic anhydride grafted styrene-ethylene-butylene-styrene block copolymer SEBS-g-MAH as compatibilizer and the other of blend grafting of maleic anhydride MAH using dicumyl peroxide DCP as initiator by reactive extrusion. The results showed that the impact properties of WTCBs using SEBS-g-MAH as compatibilizer were better improved than that of the blend grafting. However adverse results were observed on the tensile and flexural properties of the corresponding WTBCs. The mechanical properties of WTCBs prepared from recycled plastic blends were poor to some extent than that from virgin plastic blends in general especially in elongation break. The morphology of WTCBs breaking section was analyzed by scanning electron microscopy SEM and the result showed that a good interfacial adhesion between wood flour and polymer and polymer matrix was observed with both of the two modification methods. However by blend grafting of adding DCP as initiator and MAH as monomer a better interfacial bonding between wood and plastic matrix was obtained than that of the addition of SEBS-g-MAH. Blend grafting can be considered as a potential way of increasing the interfacial compatibility of different plastics and between plastic blends and wood.

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Item Type:	Proceedings Paper
AGROVOC Term:	WOOD FLOUR
AGROVOC Term:	GRAFTING
AGROVOC Term:	PLASTICS
AGROVOC Term:	EXTRUSION
AGROVOC Term:	MECHANICAL PROPERTIES
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/16867

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