| Summary: | 碩士 === 東海大學 === 化學工程學系 === 89 === The effects of various types of compatibilizers on the mechanical properties of high-density polyethylene/wood flour (HDPE/WF) composite were investigated. Functionalized polyolefins such as maleated linear low-density polyethylene, high-density polyethylene, polypropylene, and styrene-ethylene/butylene-styrene copolymer were incorporated to reduce the interfacial tension between polyethylene matrix and wood filler. It was found that LLDPEgMA gave maximum tensile and impact strength of the composite presumably due to better compatibility. Similar but less enhanced improvements in the mechanical properties, depending on the compatibilizer loading, were seen for HDPEgMA system. With increasing loadings of PPgMA and HDPEgAA notched impact strength decreased and tensile strength increased, but SEBSgMA notched impact strength increased and tensile strength decreased. A scanning electron microscopy study was employed to reveal the interfacial region and confirm these findings. Dynamic mechanical thermal analysis confirmed the compatibility between HDPE and polyethylene based compatibilizer. And the diffuse reflectance fourier transform infrard studies showed interaction between wood flour and compatibilizers.
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