离子液体中双酚A缩水甘油醚/乙二胺环氧树脂的降解工艺和动力学  

Degradation and Kinetics of DGEBA/EDA Epoxy Resin in Ionic Liquids

作　　者：张剑秋[1] 田涛[1] 邓舞艳[1] 韩家龙[1] 宋超[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200444

出　　处：《高校化学工程学报》2015年第3期709-715,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(20777048)

摘　　要：采用离子液体作为反应介质,在235-280℃,反应3-7 h,研究了双酚A缩水甘油醚/乙二胺（DGEBA/EDA）环氧树脂的降解反应并考察了温度、时间等因素对降解的影响。通过傅里叶变换红外光谱仪对降解的残余固体进行分析,使用高效液相色谱（HPLC）法对液相产物进行定性定量研究。明确了反应后的残余固体为未降解的环氧树脂固体。获得的主要产物为苯酚、双酚A、对异丙基苯酚等。时间越长、温度越高降解率越大,主要产物收率越高,280℃,3 h时,降解率达到92%。通过Arrhenius方程进行动力学研究,计算反应的活化能,求得在Emim BF4介质中,反应活化能为Ea=156.4 k J·mol^-1,而在Bmim BF4介质中,反应活化能为Ea=109.4 k J·mol^-1。得到降解反应速率方程分别为-d[ER]/dt=8.813×10^12exp（-1.564×10^5/RT）[ER]和-d[ER]/dt=4.666×10^8exp（-1.094×10^5/RT）[ER]。Degradation of DGEBA/EDA epoxy resins was studied at 235-280℃ in ionic liquids for 3-7 h. Solid residuals from reaction were analyzed by Fourier transform infrared spectroscopy （FT-IR） and liquid products were analyzed qualitatively and quantitatively by high performance liquid chromatography （HPLC）. The results show that the solid residuals are undegraded epoxy resin and the main products are phenol, bisphenol A andp-isopropylphenol. Degradation ratio and yields of the main products increase with the increase of reaction temperature and time.The degradation ratio can reach to 92% under 280℃ for 3 h. The reaction activation energy was calculated by Arrhenius equation, which is 156.4 kJ.mol^-1 in EmimBF4 and 109.4 kJ.mol^-1 in BmimBF4. The reaction rate equation is -d[ER]/dt = 8.813×10^12exp（-1.564×10^5/RT）[ER] in EmimBF4 and -d[ER]/dt = 4.666× 10^8exp（- 1.094× 10^5/RT）[ER] in BmimBF4.

关 键 词：环氧树脂 离子液体 降解 双酚A 对异丙基苯酚 动力学 

分 类 号：TQ323[化学工程—合成树脂塑料工业]