friction materials, phenolic resins, rubber, matrix modifica

  本文关键词：硼改性酚醛树脂与丁腈橡胶比例对摩擦材料性能的影响，由笔耕文化传播整理发布。

硼改性酚醛树脂与丁腈橡胶比例对摩擦材料性能的影响

Effects of ratio of boron modified phenolic resin to nitrile butadiene rubber on properties of friction materials

[1] [2] [3] [4] [5]

Liu .lunheng, He Chunxia, Liu Jing, Fu Jingjing, Lu Derong （ 1. College of Engineering, Nanjing Agriculture University, Nanjing 210031, China; 2. The Key Laboratory of Intell

[1]南京农业大学工学院,南京210031; [2]江苏省智能化农业装备重点实验室,南京210031

文章摘要：为探究硼改性酚醛树脂与丁腈橡胶的质量比（BPF/NBR）对复合摩擦材料力学性能、耐热性能和摩擦磨损性能的影响,采用不同比例的丁腈橡胶和硼改性酚醛树脂作为复合摩擦材料基体,添加碳纤维、钢纤维、石墨、氧化铝粉和沉淀硫酸钡制成复合摩擦材料。对复合摩擦材料的密度、硬度、压缩强度和摩擦磨损性能进行了测试,用变焦距体视显微镜观察磨损表面,并分析其磨损机理。用差分扫描量热仪对摩擦材料进行耐热性分析。结果表明：BPF/NBR质量比对复合摩擦材料的力学性能、耐磨及耐热性影响较大;当硼改性酚醛树脂与丁腈橡胶质量比为6∶1时,复合摩擦材料有最高的密度、硬度和压缩强度,分别为1.933 g/cm~3、105 HRL和134 MPa;当硼改性酚醛树脂与丁腈橡胶质量比为5∶1时,摩擦材料的磨损量最小;随着BPF/NBR比例增大,复合摩擦材料表面抗犁削作用增强,黏着转移减弱。利用丁腈橡胶二次改性硼改性酚醛树脂能显著提高硼改性酚醛树脂的耐热性能,且硼改性酚醛树脂与丁腈橡胶的最佳比例介于4∶1和5∶1之间。

Abstr：Phenolic resin, epoxy resin, styrene butadiene rubber and polytetrafluoroethylene can be used as friction material matrix. Due to poor wear resistance, heat resistance and adhesive properties of epoxy resin, styrene butadiene rubber and polytetrafluoroethylene, their applications in friction materials are limited. The advantages of phenolic resin on the heat resistance, adhesive property, mechanical properties, processing properties and lower cost make it become the most commonly used in adhesive base material of composite friction material. However, the pure phenolic resins are brittle, poor toughness, high hardness, poor heat resistance, low strength and large noise during using stage, so modification is an effective method to improve the comprehensive performance. The effects of different ratio of boron modified phenolic resin （BPF） and nitrile butadiene rubber （NBR） on mechanical properties, thermal stability, friction and wear properties of the friction material were investigated. Filled with carbon fibers, steel fibers, graphite particles, A1203 particles and deposit BaSO4 particles, the friction material was prepared with different ratios of boron modified phenolic resin with NBR, which was used as the matrix material. The friction material was formed by die pressing in the temperature of 160~C and in the load of 10 MPa. The density of the friction material was tested by DH-300 electronic densimeter, the hardness of the friction material was tested by XHR-150 plastic Rockwell hardness tester, the compression strength of the friction material was tested by CSS-44100 electronic universal material testing machine, and the friction and wear properties of the friction material was tested by M-2000A friction and wear

文章关键词：

Keyword：:friction materials, phenolic resins, rubber, matrix modification, friction and wear performance, thermal stability

课题项目：国家科技支撑计划子课题资助项目（2011BAD20B03-02）; 中央高校基本科研业务费专项基金资助项目（KYZ200921）

  本文关键词：硼改性酚醛树脂与丁腈橡胶比例对摩擦材料性能的影响，由笔耕文化传播整理发布。