The Study of Morphology and Mechanical Properties Silane Treatment Rice Straw Flour/Polypropylene Composites

In this research, effects of concentration and time of silane treatment of rice straw flour on the morphology and mechanical strengths of rice straw flour/polypropylene composites were investigated. Tri etoxi vinyl silane (C8H18O3SI) made by German Merk Company with 98% purity in two concentrations of 5 and 10%, that each concentration had two immersion times including, 45 and 90 min for using treatment rice straw flour. Also the polypropylene, as a matrix with 65% wt% and MAPP as a coupling agent with 5 wt% were used for making all testing samples. For blending the internal raw materials, mixer Haake HBI system 90 machines and for making standard testing samples the injection molding were used. The results showed that composites including rice straw flour were treated with silane in the concentrations and times were recited to cause a significant increase in the bending and tensile properties (strength and modulus) in comparison with untreated composites. Also increasing the concentration and time of silane treatment among treated samples causes an increase in the bending and tensile properties. With attention to the results from morphological composites detected silane treatment cause to improve in adhesive interfacial surface of filler/ matrix, better dispersion filler in matrix and finals cause to be improved in the mechanical properties.