玻纤、木粉组合增强PP复合材料的制备及性能研究

Preparation and performance research of glass/wood flour/propylene compositions

制备玻纤与木粉组合增强聚丙烯(PP)复合材料,并研究材料的湿热性能、力学性能、表面性能及其影响因素.结果表明:随木粉含量的增加,复合材料的吸湿率增大,密度降低,拉伸强度和断裂伸长率减小,但对冲击强度影响不大,且木粉可以有效改善材料表面的亲水性,提高表面张力;而随玻纤含量的增加,材料的吸湿率减小,密度增加;适当的玻璃纤维含量能提高材料的拉伸强度和冲击强度,但玻纤含量超过一定值时,PP复合材料的断裂伸长率反而会降低;用KH-550偶联剂处理、木粉质量分数<10%、玻纤质量分数<15%的玻纤木粉组合增强PP复合材料的综合性能较好.

The glass fiber/wood flour/PP composites are prepared, and the hydrothermal stability, mechanical capability, surface property, density of the composites and its factors are studied. The results show that with the content of the wood flour increasing, the degree of moisture absorption of the composites increases and the density decreases, the tensile strength and breaking elongation of the composition decrease but the impact strength of the composition has a little change, and the interracial angle increases because the wood flour can improve the hydrophility of composites. While the content of glass fiber increases, with the increase of the glass fiber, the degree of moisture absorption of the composites decreases and the density increases, and the impact strength and the tensile strength of the composition increase, however the breaking elongation decreases while the content of the glass fiber goes beyond a certain value. The general property of the compositions with the content of wood flour 〈10% and glass fibers 〈15% and disposal by KH-550 silane coupling agent is the best.