超分散剂对SF/PP木塑复合材料结构与性能的影响

Effect of Hyperdispersant on Structure and Property of SF/PP Composites

以丁二酸酐、聚乙二醇、多乙烯多胺为原料,合成含柔性链段且具有两亲结构的水溶性超分散剂,研究了超分散剂对SF/PP木塑复合材料力学性能、热性能及微观结构的影响,探讨了复合材料的界面增客机理。实验结果表明,当超分散剂的用量为SF的5%(质量分数)时,复合材料的冲击强度达27.4kJ/m^2,弯曲强度达40.1MPa,比未经超分散剂处理的复合材料分别提高了64%和34%,复合材料的结晶度也有所提高。

A water-solubility hyperdispersant, which has amphipathic structure and flexible segment was prepared by using succinicanhydride, polyethyleneglycol-600, polyethylene polyamine as raw materials and used to modify sisal fiber. The effect of hyperdispersant on the mechanical properties, thermal properties, and fracture surface morphology of the sisal fiber （SF）/polypropylene （PP） wood-plastic composites were systematically investigated, and the interface compatibility mechanism of the sisal fiber/polypropylene wood-plastic composites was also discussed. Experimental results reveal that when the content of hyperdispersant is 5%, the impact strength of SF/PP composites reaches 27. 4kJ/m^2 and the flexural strength of that reaches 40. 1MPa, which is 64% and 34% higher than that of unmodified systems. Meanwhile, the crystallinity of the composites also leads to an increase.