多聚甲醛法硼酚醛树脂的热降解动力学  

Thermal degradation kinetics of boron-containing phenol formaldehyde resin by paraformaldehyde method

作　　者：李星[1] 高俊刚[1] 孙贝贝[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《热固性树脂》2010年第6期10-13,共4页Thermosetting Resin

基　　金：河北省自然科学基金(E2010000287)

摘　　要：采用热分析技术(TG/DTG)研究了多聚甲醛法合成硼酚醛树脂的热降解性能,利用Friedman法和Flynn-Wall-Ozawa法对其热降解动力学进行了分析,计算出了不同条件下降解过程的活化能Ea。结果表明:树脂的热降解过程分为210～438℃,438～728℃,728～900℃3个阶段,当升温速率为10℃/min时,对应热失重率分别为4.256%,40.326%和23.717%,900℃下静态空气中质量残留31.442%。合成树脂的活化能在各升温速率下的平均值是29.91kJ/mol,反应级数n为2.837。Boron-containing phenol formaldehyde resins （ BPFR） were synthesized by paraformaldehyde method. Thermal degradation properties of BPFR was investigated by TG/DTG techniques. The thermal degradation kinetics was studied by Friedman and Flynn-Wall-Ozawa methods and the activation energy of the degradation process at different conditions was calculated. The results showed that the whole thermal degradation process of cured resin was roughly divided into three stages,210 -438 ℃,438 -728 ℃and 728 -900 ℃ and the corresponding weight loss rates were 4. 256% ,40. 326% and 23. 717% ,respectively at the heating rate 10 ℃ /min. The weight resid-ual rate of cured resin at 900 ℃ in static air was 31. 442%. The average activation energies （ Ea） at different heating rates of the synthesized resins was 29. 91 kJ/mol and the reaction orders（ n） was 2. 837.

关 键 词：硼酚醛树脂 多聚甲醛 热降解动力学 热失重 活化能 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]