Mechanical and Rheological Properties of Compatibilized LDPE/Wood Flour Composites

Wei Hua Luo; Zheng Liang Wang; Xing Xing Liu

doi:10.4028/www.scientific.net/AMR.549.729

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 549Mechanical and Rheological Properties of...

Mechanical and Rheological Properties of Compatibilized LDPE/Wood Flour Composites

Abstract:

LDPE-g-MAH copolymer is prepared through reactive extrusion, and then added to LDPE/wood flour (WF) composites. Effects of LDPE-g-MAH and WF content on mechanical and rheological properties of LDPE/WF composites were investigated by melt flow rate (MFR), mechanical testing and advanced rheometric expansion system (ARES). Results show that the tensile strength of the composites increase with the increase of WF content, but the MFR value and elongation at break decrease tremendously. The tensile strength, impact strength, complex modulus and viscosity of the composites all show an increase with the application of LDPE-g-MAH on account of the enhanced interfacial adhesion. The abrupt ascent in the complex modulus of the LDPE/WF (70/30) composite when the shear rate reaches a definite value may denote changes in the aggregation structure of WF in LDPE matrix.