覆铜板半固化环氧树脂热反应级数的研究  

Study on Thermal Reaction Order of Semi-cured Epoxy Resin in Copper-clad Plates

作　　者：李标 LI Biao(Guangzhou Synthetic Materials Research Institute Co.Ltd.,Guangzhou 510665,Guangdong,China)

机构地区：[1]广州合成材料研究院有限公司,广东广州510665

出　　处：《合成材料老化与应用》2023年第2期35-37,28,共4页Synthetic Materials Aging and Application

摘　　要：采用热重(TG)分析以不同的升温速率(5、10、15、20、30℃/min)分别在氮气气氛和空气气氛下对覆铜板中双氰胺固化环氧树脂热分解行为进行研究,根据TG曲线,采用Coats-Redfern和Ozawa热分析处理动力学数据的方法,计算环氧树脂热分解过程中的反应活化能E、反应级数n及频率因子A。结果表明,空气气氛下5%~30%的失重率下反应表观活化能在355.0~366.5 J/mol之间,频率因子A所对应的ln A值在4.987~6.810之间;氮气气氛下5%~30%的失重率下表观活化能在297.0~357.4J/mol之间,频率因子A所对应的ln A值在4.985~7.093之间;环氧树脂的热裂解反应和热氧化分解反应均为一级反应。研究发现,随着环氧树脂失重率的增加,氮气气氛下热分解活化能略有提高,而空气气氛下的活化能几乎不变。该研究为环氧树脂的热分解提供了重要的动力学参数。Thermogravimetric analysis(TG)was used in this paper at different heating rates(5、10、15、20、30℃/min).The activation energy(E),reaction order(n)and frequency factor(A)were calculated by using Coats-Redfern and Ozawa thermal analysis methods based on thermogravimetric curves.The results show that the apparent activation energy of the reaction under the weight loss rate of 5%~30%in air atmosphere is between 355.0~366.5 J/mol,the lnA value corresponding to the frequency factor A is between 4.987~6.810,the apparent activation energy under the weight loss rate of 5%~30%in nitrogen atmosphere is between 297.0~357.4 J/mol,and the lnA value is between 4.985~7.093.The thermal cracking reaction and thermal oxidative decomposition reaction of epoxy resin are both primary reactions.It is found that the activation energy of thermal decomposition increases slightly in N2 atmosphere with the increase of weight loss percentage of epoxy resin,but no change in air atmosphere.The research provides important kinetic parameters for thermal decomposition of epoxy resin.

关 键 词：环氧树脂 热重分析 活化能 热分解动力学 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业] TQ320