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采用乙烯基三乙氧基硅烷对稻壳粉进行表面处理,然后在过氧化二苯甲酞(BPO)引发剂的作用下与高密度聚乙烯(PE-HD)混合挤出制备了PE-HD/稻壳粉复合材料。对复合材料进行力学性能测试和熔体流动速率测定,并对硅烷接枝PE—HD粒子进行红外光谱分析,同时利用扫描电子显微镜分析偶联剂处理对复合材料微观形貌的影响。结果表明,偶联剂的加入,降低了熔体流动速率,使得木塑复合材料各组分的分散性和相容性得到了改善;当偶联剂、PE-HD和稻壳粉的质量比为1:100:50时,复合材料的力学性能最佳,其中弯曲强度相对于未加偶联剂的复合材料提高了32.24%,冲击强度提高了140%;稻壳粉的增加,降低了熔体流动速率,提高了复合材料的弯曲强度,降低了拉伸强度、冲击强度和断裂伸长率;乙烯基三乙氧基硅烷已经熔融接枝在PE—HD分子上。
The surface of rice hull flour was treated with vinyltriethoxysilane, then PE-HD was prepared by mixing with high density polyethylene (PE-HD) under the action of BPO initiator. / Rice hull powder composite material. The mechanical properties and melt flow rate of the composites were tested. The infrared spectra of silane-grafted PE-HD particles were analyzed. The effect of coupling agent on the microstructure of the composites was analyzed by scanning electron microscopy. The results showed that the addition of coupling agent decreased the melt flow rate and improved the dispersibility and compatibility of the components. When the mass ratio of coupling agent, PE-HD and rice hull flour 1: 100: 50, the mechanical properties of the composites were the best. The flexural strength was increased by 32.24% and the impact strength by 140% compared with the composites without the coupling agent. The increase of the rice hull flour and the decrease of the melt The bulk flow rate increases the flexural strength of the composites and decreases the tensile strength, impact strength and elongation at break. Vinyltriethoxysilane has been melt grafted onto the PE-HD molecule.