环氧树脂的等温固化动力学及其在覆铜板中的应用
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摘要
通过差示扫描量热法(DSC)研究了双酚A环氧树脂/Dicy体系的固化行为,并建立该体系的等温固化动力学方程。由DSC反应曲线得到体系在160℃恒温温度下固化度与时间的关系,实测固化度与理论固化度十分接近,说明可以采用等温固化度曲线预测体系达到某一固化度所需烘烤时间,为半固化片的生产提供一定的参考作用。
The curing behavior of bisphenol A epoxy resin/Dicyandiamide system was studied by differential scanning calorimetry(DSC)and the isothermal curing kinetics equation of the system was established. The relationship between curing time and curing degree at 160 ℃ constant temperature was obtained by DSC reaction curve. The measured curing degree is very close to the theoretical curing degree. The results show that isothermal curing curve can predict the curing time required for the system to reach a certain curing degree. It will provide a reference for the production of prepreg.
The curing behavior of bisphenol A epoxy resin/Dicyandiamide system was studied by differential scanning calorimetry(DSC)and the isothermal curing kinetics equation of the system was established. The relationship between curing time and curing degree at 160 ℃ constant temperature was obtained by DSC reaction curve. The measured curing degree is very close to the theoretical curing degree. The results show that isothermal curing curve can predict the curing time required for the system to reach a certain curing degree. It will provide a reference for the production of prepreg.
引文
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[2]Schawe J E K. Adescription of chemical and diffusion control in isothermal kinetics of cure kinetics[J]. Thermochimica Acta,2002,388(1/2):299-312.
[3]代晓青,肖加余,曾竟成等.等温DSC法研究RFI用环氧树脂固化动力学[J].复合材料学报,2008,25(4):18-23.
[4]李燕芳,赵洪池,高俊刚等.双酚-S环氧树脂与间苯二胺固化反应动力学[J].热固性树脂,2005,20(3):5-8.
[5]柯红军,乔英杰,陈俊英等.等温DSC法研究液态橡胶改性环氧树脂固化动力学[J].玻璃钢/复合材料,2013,3:43-47.
[6]谢占军,杨喜,王继辉.等温DSC法研究风电叶片用环氧树脂固化动力学[J].玻璃钢/复合材料,2018,6:94-98.
[7]Chern C S,Poehlein G W.Akinetic model of curing reactions of epoxiedes with amines[J].Polymer Engineering&Science,1987,27(11):788-795.
[8]Khanna U,Chanda M A kinetic scheme for anhydride curing of diglycidyl ester with tertiary amine as catalyst[J].Journal of applied polymer science,1993,50(9):1635-1644.