脱水蓖麻油制备聚酰胺/环氧树脂体系的 固化行为及固化工艺*
许 蓉,谢 晖,黄 莉
(南京工业大学化学化工学院,江苏,南京 210009 )
摘要:采用脱水蓖麻油制得聚酰胺固化剂,并用差示扫描量热法(DSC)研究了该固化剂与环氧树脂体系的固化动 力学模型。根据Kissinger方法和Crane方法得到该固化体系的动力学参数:表观活化能Ea为45·81 kJ/mo,l反应级数 n为0·88,频率因子A为3·10×105s-1。由外推法得到体系最佳固化工艺为:起始固化温度为60℃,恒温固化温度为 90℃,以及后处理温度为110℃。体系固化前后的红外光谱(FT-IR)进一步验证了该固化工艺的合理性。
关键词:脱水蓖麻油;聚酰胺;环氧树脂;差示量热扫描法;固化动力学 中图分类号:TQ323. 5 文献标识码:A 文章编号: 1001-9456(2008)05-0008-03 Curing Behavior and Curing Techniques of Dehydrated
Castor O ilPrepared Polyam ide/Epoxy Resin System
XU Rong,XIEHu,i HUANG Li (College ofChemistry and ChemicalEngineering,NanjingUniversity ofTechnology,
Nanjing, Jiangsu 210009,China) Abstract:The
polyamide curing agentwas prepared by dehydrated
castoroi.l Differential scanning calorimetry(DSC)
was used to determine the curing kineticsmodels
of the curing and epoxy resin system.The kinetic
parameters of the system were calculated by
theKissingermethod and the Cranemethod,
respectively.Analysis of theDSC results
indicated that the activation energy of the
system was 45·81 kJ/mo,l the reaction orderwas
0·88 and the reaction frequency factorwas
3·10×105s-1. In addition, the best curing
techniques were also studied by extrapolation.
Itwas found that the initial curing temperature
was 60℃, constant curing temperaturewas 90℃and
final treatment temperature was 110℃. Furthermore,
the fourier transform infrared (FT-IR) spectrum
of the curing system certified that the curing
techniqueswerewithin acceptable limits. Key words:
dehydrated castor oi;l polyamide; epoxy resin;