基于高比例尿素改性PF树脂的固化特性及动力学研究
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摘要
为探讨高比例尿素改性PF(酚醛树脂)的固化特性,采用差示扫描量热分析(DSC)方法,对不同升温速率条件下树脂的固化过程、特征放热峰温度等进行了检测分析;通过Kissinger和Ozawa方法,计算了固化反应表观活化能,建立了固化反应动力学模型。研究结果表明:高比例尿素改性PF树脂的固化反应活化能较低,反应易于进行,固化温度为131.3℃,较普通PF树脂降低了近20℃。
In order to investigate the curing characteristics of PF(phenolic formaldehyde resin)modified by high proportion urea,DSC(differential scanning calorimetry) was used to analyze the curing process and characteristic exothermic peak temperature of the resin at different heating rates. The apparent activation energy of the curing reaction was calculated by Kissinger and Ozawa methods,and the kinetic model of curing reaction was established. The research results showed that the activation energy of curing reaction of PF resin modified by high proportion urea was low,and the reaction was easy to proceed. The curing temperature was 131.3 ℃,which was nearly 20 ℃ lower than that of ordinary PF resin.
In order to investigate the curing characteristics of PF(phenolic formaldehyde resin)modified by high proportion urea,DSC(differential scanning calorimetry) was used to analyze the curing process and characteristic exothermic peak temperature of the resin at different heating rates. The apparent activation energy of the curing reaction was calculated by Kissinger and Ozawa methods,and the kinetic model of curing reaction was established. The research results showed that the activation energy of curing reaction of PF resin modified by high proportion urea was low,and the reaction was easy to proceed. The curing temperature was 131.3 ℃,which was nearly 20 ℃ lower than that of ordinary PF resin.
引文
[1]顾继友.胶粘剂与涂料[M].北京:中国林业出版社,1999:105-106.
[2]杜官本,李君,杨忠.苯酚-尿素-甲醛共缩聚树脂研制Ⅰ合成与分析[J].林产工业,2000,36(5):73-77.
[3] MARKOVIC S,DUNJIC B,ZLATANIC A,et al.Dynamic mechanical analysis study of the curing of phenolformaldehyde novolac resins[J].Journal of Applied Polymer Science,2001,81(8):1902-1913.
[4] DE MEDEIROS E S,JAM A,JOSEPH K,et al.Curing behavior of a novolac-type phenolic resin analyzed by differential scanning calorimetry[J]. Journal of Applied Polymer Science,2010,90(6):1678-1682.
[5] KISSINGER H E.Reaction kinetics in differential thermal analysis[J]. Analytical Chemistry,1957,29(11):1702-1706.
[6] OZAWA T.Kinetic analysis of derivative curves in themal analysis[J]. Journal of Thermal Analysis,1970,2(3):301-324.
[7]唐传林,季承钧.绝缘材料工艺原理[M].北京:机械工业出版社,1993.
[8] KAELBLE D H,SMITH T.Analysis of curing kinetics in polymer composites[J].Journal of Polymer Science Polymer Letters Edition,1973,11(8):533-540.
[9]蔡正千.热分析[M].北京:高等教育出版社,1993.
[10]林景雪,陶鑫,伊阳.酚醛树脂固化动力学研究及其耐热性能评价[J].工程塑料应用,2007,35(10):57-59.
[11]傅维镳,张永康,王安清.燃烧学[M].北京:高等教育出版社,1998.
[2]杜官本,李君,杨忠.苯酚-尿素-甲醛共缩聚树脂研制Ⅰ合成与分析[J].林产工业,2000,36(5):73-77.
[3] MARKOVIC S,DUNJIC B,ZLATANIC A,et al.Dynamic mechanical analysis study of the curing of phenolformaldehyde novolac resins[J].Journal of Applied Polymer Science,2001,81(8):1902-1913.
[4] DE MEDEIROS E S,JAM A,JOSEPH K,et al.Curing behavior of a novolac-type phenolic resin analyzed by differential scanning calorimetry[J]. Journal of Applied Polymer Science,2010,90(6):1678-1682.
[5] KISSINGER H E.Reaction kinetics in differential thermal analysis[J]. Analytical Chemistry,1957,29(11):1702-1706.
[6] OZAWA T.Kinetic analysis of derivative curves in themal analysis[J]. Journal of Thermal Analysis,1970,2(3):301-324.
[7]唐传林,季承钧.绝缘材料工艺原理[M].北京:机械工业出版社,1993.
[8] KAELBLE D H,SMITH T.Analysis of curing kinetics in polymer composites[J].Journal of Polymer Science Polymer Letters Edition,1973,11(8):533-540.
[9]蔡正千.热分析[M].北京:高等教育出版社,1993.
[10]林景雪,陶鑫,伊阳.酚醛树脂固化动力学研究及其耐热性能评价[J].工程塑料应用,2007,35(10):57-59.
[11]傅维镳,张永康,王安清.燃烧学[M].北京:高等教育出版社,1998.