尼龙-66改性酚醛树脂的热解动力学与固化行为  

Thermal Decomposition Kinetics and Curing Behaviors of Phenolic Resin Modified by Nylon-66

作　　者：熊伟[1] 张光华[1] 陈淼[1] 刘学谦[2] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]复旦大学高分子科学系,上海200433

出　　处：《高分子材料科学与工程》2013年第10期76-80,共5页Polymer Materials Science & Engineering

摘　　要：以苯酚、甲醛、尼龙-66(PA66)为原料,合成了PA66改性酚醛树脂(PF)。通过热重法(TGA)分析了PA66改性PF的热分解过程;非等温差示扫描量热(DSC)法探讨了PA66改性PF的固化行为;根据Kissinger法、Ozawa法和Crane法分别求解出了固化反应和热分解反应的活化能、反应级数和频率因子。结果表明,改性树脂的热分解分为3个阶段,主体结构中苯环从440℃左右开始分解炭化。热分解活化能为312.4860 kJ/mol,反应级数为0.9552,频率因子为4.0949×1018s-1;固化过程中PA66的亚氨基与PF的羟甲基发生脱水缩合作用而加速了树脂的交联固化,同时吸收能量而导致总反应焓的降低,固化表观活化能为77.4252 kJ/mol,反应级数为0.9315,频率因子为1.4013×107s-1。The nylon-66 modified phenolic resin was synthesized with phenol, formaldehyde and nylon-66. The thermal decomposition of phenolic resin modified by nylon-66 was analyzed by TG and the curing behaviors were investigated by DSC. The results show that the main structure of the modified resin begins to decompose from 440 ℃, and the condensation reaction taken place during the curing process is between the imino group of PA66 and methylol group of PF. The condensation reaction accelerates the curing speed. Besides it absorbs the curing reaction energy, ＇leading to the total reaction enthalpy reduced. By Kissinger, Ozawa and Crane equation, the obtained activation energy, reaction order and per-exponential of the thermal decomposition are 355.22 k,J/mol, 0.9315, 2.7889 x 10^21s-1 respectively. The curing reaction average activation energy is 77.4252 kJ/mol, reaction order is 0. 9315, and frequency factor is 1. 4013 x10^7 s-1.

关 键 词：酚醛树脂 尼龙-66 热解动力学 固化动力学 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]