【作者】 林有希； 余大刚； 高诚辉； 何福善；

【Author】 JIANG Jian-min,ZHAI Dong-xun,HE Ding-yong,WANG Zhi-hui,ZHOU Zheng,LIU Xu (College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124)

【机构】 福州大学机械工程及自动化学院；

【摘要】 采用悬浮聚合法合成摩擦材料用热固性酚醛树脂,用红外光谱、热重分析、冲击试验等方法对其结构、机械以及热学性能进行分析。结果表明,悬浮聚合成功合成了热固性甲阶酚醛树脂,固化温度122℃,热分解温度396℃,在400℃时热失重率12.7%,热学性能显著提高;与本体聚合制备的酚醛树脂相比,悬浮聚合酚醛树脂冲击强度提高了15.6%,且明显高于硼改性酚醛树脂。悬浮聚合法制备的聚合物分子量分布较均匀,提高树脂的交联度,减少本体聚合分子量分布过宽引起的应力集中,有助于改善酚醛树脂的冲击性能。更多还原

【Abstract】 Thermosetting phenolic resins were synthesized by suspension polymerization(SPPR).The structure,mechanical and thermal properties of the resin were analyzed by infra-redspectrum,thermogravimetric analysis and impact test.The results show that the resol phenol formaldehyde resins file synthesized successfully.The curing temperature of the thermosetting phenolic resins is 122℃and thermal decomposition temperature is 396℃.Its losing weight age 127%at 400℃.Thermal performance are improved significantly.Competed with phenolic resin synthesized by bulk polymerization、impact strength of SPPR increases by 15.6%,also higher than that of boron modified phenolic resm.The stable molecular weight distribution of SPPR contributes to improve the crosslinking degree and abate stress concentration.which conforms to the better mechanical and thermal properties of the resin.更多还原