【摘要】 通过甲基丙烯酸缩水甘油酯(GMA)、聚乙烯(PE)、聚丙烯(PP)、木粉和其他助剂的熔融挤出,制备了PE/PP/木粉复合材料。通过扫描电镜(SEM)观测了复合材料的冲击断面形貌。利用傅立叶变换红外光谱(FT-IR)分析了复合材料经抽提后所得木粉的组成。测试了复合材料的力学性能和热变形温度(HDT)。研究了苯乙烯(St)和亚磷酸三苯酯(TPP)对反应增容的影响。探索了润滑剂和木粉含量对复合材料性能的影响。结果显示,直接反应增容后,部分树脂分子键合到了木粉表面上,木塑两相的结合力明显增强;复合材料的力学性能和HDT均明显提高。St的加入进一步提高了复合材料的力学性能和HDT;而TPP的加入则导致复合材料的弯曲强度和HDT稍有下降。加入润滑剂后,复合材料的加工性能变好,而拉伸强度、弯曲强度和HDT稍有下降。更多还原

【Abstract】 Polyethylene(PE)/polypropylene(PP)/wood-flour composites were prepared by means of melt extrusion of glycidyl methacrylate(GMA),PE,PP,wood-flour and other additives.Impact cracking surface morphology of the composites was observed via scanning electron microscope(SEM).Composition of wood-flour extracted from the composites was analysed via Fourier transform infrared spectra(FT-IR).Heat distortion temperatures(HDTs)and mechanical properties of the composites were tested.The effect of styrene(St)and triphenyl phosphite(TPP)on the reactive compatibilization was evaluated,and the effect of lubricants and wood-flour content on properties of the composites were also explored.The results indicate that some of resin molecules in the composites are bonded onto the surface of wood-flour after reactive extrusion resulting in the improvement of compatibility between resin and wood-flour.The mechanical properties and HDT of the composites are obviously improved.Mechanical properties and HDT of the composites were improved due to the addition of St.However,the addition of TPP decreases slightly the mechanical properties and HDT of the composites.After lubricants are added,the process properties of the composites are improved,and the mechanical properties and HDT decrease slightly.更多还原