GF及偶联剂改性PVC/稻壳木塑复合材料

采用模压成型的方式、通过实验探索玻璃纤维(GF)含量及偶联剂处理对聚氯乙烯(PVC)/稻壳木塑复合材料的力学特性和耐磨性的影响。实验结果表明:PVC/稻壳木塑复合材料的硬度随GF含量增加呈现先减小后增大的趋势。GF含量在15%以下时,随着GF用量的增大,木塑复合材料的拉伸强度与冲击强度总体上随之变大,超过15%则随GF含量增大而减小。而弯曲强度出现先减后增的趋势,弯曲弹性模量则与之相反。木塑复合材料的耐磨损性在GF含量为15%时最佳,摩擦系数在10%时最大。合适的偶联剂处理能增强木塑复合材料的力学性能和耐磨性。其中γ–氨丙基三乙氧基硅烷(KH550)的增强效果比较好,钛酸酯不能提高PVC/稻壳木塑材料的力学性能和耐磨性。

PVC/Rice Husk Wood Composites Modified with Glass Fiber and Coupling Agent

With the method of molding press experiments,the effect of glass fiber (GF) content and coupling agent dispose on the mechanical properties and friction and wear properties of the PVC / rice husk wood-plastic composites were explored.Experimental results show that the hardness of material appear a trend of reducing first then increasing with GF content increase.When GF content is below 15％,with the increase of the content of GF,the tensile strength and impact strength of PVC/rice husk wood-plastic composites increase.With the increase of GF content,when it is more than 15％,the bending strength appear a trend of reducing first then increasing,and the flexural modulus is the opposite.The wear resistance of composites is best at GF content is 15％,the friction coefficient is biggest at GF content is 10％.The suitable coupling agent dispose can significantly improve the mechanical behavior and friction and wear properties of PVC / rice husk wood-plastic composites.3-Aminopropyltriethoxysilane (KH550) has cracking effect.Titanate can not improve mechanical behavior and friction and wear properties of the composites.