【摘要】 采用X 射线衍射(WAXD)、红外光谱(IR)、核磁共振(1H-NMR,13C NMR)等现代仪器对汽车同步器齿环摩擦材料所选用的腰果壳油、三聚氰胺改性酚醛树脂基体的组成进行了分析表征, 采用热分析(DSC TG) 技术考察了其固化和氧化分解过程。X-射线衍射显示, 改性酚醛树脂主要为非晶结构; 红外光谱显示其结构中存在腰果壳油、三聚氰胺的成分; 核磁共振1H、13C显示, 酚醛与腰果壳油、三聚氰胺形成了共聚物; DSC TG分析结果表明, 在 70 5℃和98 3℃附近出现两个挥发吸热峰, 失重 2 87%; 在 113 1℃和 156 1℃附近出现两个固化放热峰; 有一个平缓的氧化分解放热峰: 156 1℃以后开始放热失重; 约 170~180℃开始缓慢氧化, 286 6℃为氧化最高点温度, 500℃热分解失重 35 82%, 残余量为 81 2%。更多还原

【Abstract】 With modern instruments including X-ray diffraction,IR,1H-NMR, 13C-NMR,automobile synchronizing ring friction materials,which composed of phenolic resin modified by cashew nut oil and melamine were analyzed.With DSC-TG technology,its solidifying,oxidation and decomposition process were observed.X-ray diffraction shows modified phenolic resin is mainly amorphous structure.IR indicates that there is cashew nut oil and melamine in the structure.1H-NMR and 13C-NMR show phenolic,cashew nut oil and melamine form copolymer.From DSC-TG analyzing,around 70.5 ℃ and 98.3 ℃ two volatile endothermal peaks appeare.There is an exothermic peak by oxidation and decomposition.After 156.1 ℃,it begins to exothermic and lose weight, from 170 ℃ to 180 ℃ it slowly oxidates,and at 286.6 ℃ it reaches max oxidation temperature. At 500 ℃ it begins to thermal decompose and the weightlessness is 35.82%, the remains is 81.2%.更多还原