酚醛树脂激波管试验的高温热解研究

使用激波管作为加热手段研究酚醛树脂在1200~1800K温度范围内的热解特征。气相产物中主要碳氢产物是甲烷、乙烯、乙炔、苯和甲苯。获得试验温度范围内主要碳氢产物分布随热解温度的变化关系。结果表明,在试验温度范围内随着热解温度的升高酚醛树脂的热解机理发生重大变化。1400K以下热解断键过程主要发生在亚甲基桥链结构上;1400K以上芳环开环成为主要的热解通道,生成大量的乙炔。

Pyrolysis Study of Phenolic Formaldehyde Resin at High Temperature by Shock Tube Test

The pyrolysis behavior of phenolic formaldehyde resin was studied in a shock tube at high temperatures between 1200K and 1800K.The major hydrocarbon products were identified as methane,ethene,acetylene,benzene and toluene.The variation of the major products distribution with pyrolysis temperature was obtained.It was found that the thermal decomposition of phenolic formaldehyde resin mainly took place at the methylene bridges at the temperatures below 1400K,while the cracking of aromatic framework became the major pyrolysis pathway at the temperatures above 1400K,which gave birth to large amount of acetylene.