改性芦苇纤维/PE复合材料性能研究

Study on Properties of Modified Reed Fiber/Polyethylene Composites

以未处理芦苇纤维及通过硅烷偶联剂、钛酸酯偶联剂处理芦苇纤维作为增强体,以高密度聚乙烯(HDPE)和低密度聚乙烯(LDPE)共混物作为基体,制备了芦苇纤维/聚乙烯(PE)复合材料。探讨了不同偶联剂处理芦苇纤维对复合材料力学、加工性能以及微观结构的影响。结果表明:当HDPE和LDPE的共混质量比为30∶70、芦苇用量为30份时,所得复合材料的综合性能较好;采用硅烷偶联剂处理芦苇纤维/PE复合材料较未经处理复合材料的冲击强度、拉伸强度、弯曲强度分别提高了29.3%,33.1%及31.5%,吸水率下降了47.5%,加工流动性有所提高,同时对热性能无不良影响。

With untreated reed fiber and the reed fiber modified by silane coupling agent, titanate coupling agent as reinforcement respectively, HDPE and I,DPE blend as matrix, the reed fiher/PE composites were prepared. The effects of different modifiers and different treatment conditions on the mechanical properties, the processing performance and microstructure of the composites were studied. The resuhs show lhat when the mass rate of HDPE and LDPE is 30 ： 70, the dosage of the reed is 30 phr, the comprehensive performance of the composites is belier. Compared to that without pre treatment composites,the impact strength, tensile strength and bending strength of the reed fiber/PE composites processed by silane coupling agent increase by 29.3%, 33. 1% and 31.5%, respectively. Bibulous rate decreases by 47. 5% and processing liquidily ix improved, and lhere is no adverse effect on the thermal performance.