酚醛树脂结构对其热解成炭特性的影响  

Effect of the Structure on the Pyrolysis Property of Phenolic Resin

作　　者：陈鸯飞[1] 陈智琴[2] 刘洪波[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]江西科技师范学院材料表面工程重点实验室,江西南昌330013

出　　处：《高分子材料科学与工程》2009年第5期71-74,78,共5页Polymer Materials Science & Engineering

基　　金：国家重点基础研究发展规划资助(973)项目(2006CB600903)

摘　　要：采用傅立叶红外光谱对固化前后的酚醛树脂进行结构表征,通过热重法对固化后酚醛树脂的热降解失重温度及其高温下的成炭率进行分析,研究酚醛树脂结构中取代基的相对含量与其热稳定性及成炭率的关系。结果表明,酚醛树脂在高温下的成炭率与其结构中取代基的含量有一定的对应关系,亚甲基含量高、羰基和醚键含量低的酚醛树脂固化物高温成炭率较高。在六种不同醛酚比(F/P)的树脂固化物中,亚甲基的含量以F/P为1.2时的固化物最大,羰基的含量则以F/P为1.2时最小。固化后的六种酚醛树脂中以PF1.2用于交联的有效取代基(亚甲基)数目最多,交联密度最高,具有最高的成炭率(73.78%)。The thermal property of different F/P moral ratios cured phenolic resins were analysed by thermogravimetry. The structures of them were characterized by Fourier transform infrared spectroscopy （FT-IR）. The relationship between the substitution rings structure of phenolic resins and their thermal behaviors （degradation temperature and char yield） was studied. The experimental results show that： the char yield under high temperature is related to the concentration of substitution groups of phenolic resin. The higher concentration of methylene bridge and the lower concentration carbonyl group in substitution rings structure, the higher char yield of the cured resin under high temperature. The maximum concentration methylene bridge structure and the minimum concentration carbonyl group were obtained at the F/P equal to 1.2; therefore the PF1.2 has the largest valid substitution structure （methylene bridge）. The char yield under 700 ℃ of PF1.2 is the highest and it＇s value is equal to 73.78%.

关 键 词：酚醛树脂 醛酚比 亚甲基 羰基 成炭率 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]