【摘要】 以2,3’,4,4’-联苯四酸二酐、4,4’-二氨基二苯甲烷和4-苯乙炔基苯酐为原料合成聚酰亚胺（PI）树脂,采用红外光谱对其结构进行了表征。采用SiO₂为耐磨改性剂,对聚酰亚胺进行改性,制备PI/SiO₂复合材料,研究其摩擦磨损性能,结果表明当SiO₂含量为10%时,PI/SiO₂复合材料具有较好的摩擦磨损性能,摩擦系数为0.145,磨损量为3.8mg。更多还原

【Abstract】 Polyimide（PI） resin was successfully synthesized using 2,3,3’,4’-biphenyltetracarboxylic dianhydride, 4,4’-diaminodiphenylmethane and 4-phenylethynyl phthalic anhydride as raw materials. The structure of the polyimide resin was characterized by IR spectroscopy. SiO₂ was used as an abrasion resistance modifier to prepare PI/SiO₂ composites, friction and wear ptoperties of PI/SiO₂ composites were investigated. The results indicated that PI/SiO₂ composite material showed good friction and wear properties when the SiO₂ content was 10（w）%, friction coefficient is 0.145, the wear quantity is 3.8 mg.更多还原