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http://dx.doi.org/10.7317/pk.2013.37.2.204

Effects of Melt-blending Condition and Additives on Mechanical Properties of Wood/PP Composites  

Ahn, Seong Ho (Department of Chemical Engineering, Chungbuk National University)
Kim, Dae Su (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Polymer(Korea) / v.37, no.2, 2013 , pp. 204-210 More about this Journal
Abstract
Effects of additives (lubricant and antioxidant) and melt-blending condition (temperature, time and rotor speed) on the mechanical properties of polypropylene-based wood polymer composites (WPCs) were investigated. WPCs were prepared by melt-blending followed by compression molding. To understand melt-blending procedure, torque change of the WPC melt-blend was monitored. Maleic anhydride modified PP and nanoclay were used as a compatibilizer and a reinforcing filler, respectively. UTM and izod impact tester were used to measure the mechanical properties of the WPCs and a color-difference meter was used to measure the discoloration of the WPCs according to melt-blending condition. The mechanical properties showed that the optimized melt-blending condition was $170^{\circ}C$, 15 min, and 60 rpm. The mechanical properties of the WPCs decreased with increasing lubricant and antioxidant content. The two step method, adding wood flour later separately during melt-blending, was more effective than the typical one step method for improving the mechanical properties of the WPCs.
Keywords
polypropylene; wood; composites; antioxidant; lubricant; melt-blending condition;
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