摘要
采用聚醚型甲苯二异氰酸酯(TDI)聚氨酯预聚体与3,3'-二氯-4,4'-二氨基二苯基甲烷(MOCA)、氨丙基三乙氧基硅烷(APTEOS)和正硅酸乙酯(TEOS)交联反应,制备耐温型有机-无机杂化聚氨酯复合材料。通过傅里叶红外光谱仪(IR)、热重分析仪(TGA)、摩擦试验机和硬度计等技术对制备的材料进行了结构表征和性能测试,结果表明,硅氧网络的引入使聚氨酯复合材料的热稳定性得到了提高,同时该材料具有极低的摩擦系数(200 r/min以上,摩擦系数在0.001左右),硬度在92 A左右。该有机-无机杂化聚氨酯复合材料已满足了水润滑轴承在耐摩擦、高承载、易加工等方面的要求。
Organic-inorganic hybrid polyurethane composites with excellent heat-resistance were synthesized via reaction of toluene-2,4-diisocyanate （TDI） prepolymer, 3,3-dichloro-4,4-diamino diphenylmethane （ MOCA）, aminopropyl triethoxysilane （ APTEOS ） and tetraethoxysilane （ TEOS ）. Molecular structures and properties of the material were characterized by IR, TGA, friction tester and hardness analyzer. Thermal stabilities of the composites were greatly improved due to the introduction of the Si-O networks into the molecules. These materials show rather low ：friction coefficient（ about 0. 001 as speed higher than 200 r/min） and appropriate hardness （ shore 92 A） for water-lubricated bearings application. The results confirmed that the organic-inorganic hybrid polyurethane composites prepared in this work were reliable for water-lubricated bearings production due to the excellent performances of wearability, high loadability and easy processibility.
出处
《应用化学》
CAS
CSCD
北大核心
2012年第1期14-17,共4页
Chinese Journal of Applied Chemistry
关键词
聚氨酯
硅烷偶联剂
溶胶-凝胶法
有机-无机杂化
水润滑轴承
polyurethane, silane coupling agent, sol-gel method
organic-inorganic hybrid, water-lubricated bearing
