| Autor: |
Qiang Yuan, Dongyang Wu, Gotama, Januar, Bateman, Stuart |
| Předmět: |
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| Zdroj: |
Journal of Thermoplastic Composite Materials; May2008, Vol. 21 Issue 3, p195-208, 14p, 11 Black and White Photographs, 1 Diagram, 7 Charts |
| Abstrakt: |
Wood plastic composite with high modulus and impact strength were manufactured by combining polyethylene (PE) or polypropylene (PP) with wood fiber (WF) using twin-screw extruder techniques. The advantage of using low melt viscosity polymer matrices is that it enhances the modulus and reduces the overall viscosity of the system. SEM analysis of the composites indicates that tlie polynler molecules penetrate into the vessels and cracks of tlie cellulose fiber, which decreases the number of voids and produces a higher density composite with improved mechanical performance. The addition of maleic anhydride-grafted polyolefin as a compatibilizer improves the level of adhesion between the wood fiber and the polyolefin matrix. The impact strength of the conlposites with compatibilizer is 60%higher than those without. Young's moduli of WF/PE and WF/PP with compatibilizer were 4.4 and 5.4GPa, respectively, nieanwhile the impact strengths of WF/PE and WF/PP were 44 and 24J/ni, where the WF content was 50wt%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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