新型摩阻材料研究——酚醛树脂改性与应用

A Study of a New Friction Material -The Modification and Application of Phenolic Resin

本文以双马来酰亚胺改性G酚醛树脂、用粉末橡胶作改性树脂的增韧剂,对制备汽车用无纤维新型摩擦材料作了初步研究.红外光谱分析证明:改性过程发生了氢离子移位加成反应,在酚醛链上引入了双马来酰亚胺.热失重分析表明:改性树脂的热分解温度提高54～58℃,明显改善了材料的抗热衰退能力和抗冲击性能.由改性树脂(WR—10)和粉末丁苯橡胶(用量各10%)为基材的摩阻材料,其摩擦系数、抗热衰退能力、耐磨性能和抗冲击强度等,都达到了国家标准要求,是值得继续研究开发的汽车无纤维新型制动材料.

A new non-fiber friction material for automotive use was prepared by means of the modification of G-phe-nolic resin with bismaleimide and toughening with powdered rubber. The IR spectrum showed that the hydrogen ion transfering addition reaction happened between bismaleimide and phenolic resin, and as a result, the bismaleimide was led in the phenolic molecular link. The result of thermogravimetry showed that the decomposition temperature of the modified phenolic resin was 54~58℃ higher than that of original phenolic resin. The modification of phenolic resin could obviously improve the thermal failure resistance at high temperature and the impact strength of the friction material. The friction factor, wear resistance, thermal failure at high temperature and the impact strength of the new friction material, in which the matrix was made from modified phenolic resin (WR-10) and powdered styrene butadiene rubber of 10% by weight respectively, could all meet the national standard. The new friction material is valuable to be studied and developoed for automotive use.