高温固化胶膜的组分与固化动力学分析  

Analysis of Compositions and Cure Kinetics of High Temperature Adhesives

作　　者：乔海涛 QIAO Hai-tao(AECC Beijing Institute of Aeronautical Materials,Beijing100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095

出　　处：《高分子通报》2022年第12期146-153,共8页Polymer Bulletin

摘　　要：采用红外分析和光电子能谱分析对ВК-36胶膜的组分进行了分析研究。ВК-36胶膜组分中添加有较多的铝粉以及少量气相二氧化硅,其他主要组分与SY-14A胶膜类似。用差热扫描量热分析(DSC)获得了ВК-36胶膜的固化特征温度。根据DSC数据,以固化峰值温度对升温速率β的对数(lnβ)进行线性回归处理,通过T_(p)=T_(1)+ΔTlnβ可以更合理地获得固化温度工艺参数。上述方程可以用于解释表观活化能较高或较低的一些规律,即活化能(E)近似等于RT_(1)^(2)/ΔT。用上述简易方法所计算的活化能与Kissinger和Ozawa方法所获得的活化能非常接近。不同升温速率数据组合所计算的活化能是不同的,随升温速率的增加,活化能有增加的趋势。用极限法对简式E_(a)≈RT_(1)^(2)/ΔT进行了理论推导。Compositions of ВК-36film adhesive were analyzed by using Fourier-transform infrared spectroscopy(FTIR)and X-ray photon electron spectroscopy(XPS).Main compositions ofВК-36film adhesive are similar to those of SY-14Afilm adhesive except thatВК-36film adhesive has a great amount of aluminum powder and fumed silica.Dynamic differential scanning calorimetry(DSC)experiments at multiple heating rates(β)were performed to obtaine the characteristic reaction temperatures(maximum cure peak temperatures T_(p))ofВК-36film adhesive.Based on changes of T_(p) with different heating rates(β)from DSC curves,a linear equation,T_(p)=T_(1)+ΔTlnβ,had been set up to determine the curing temperature more reasonably.The above equation can be used to explain some laws of higher or lower of apparent activation energies(E_(a)),by which the apparent activation energy(E_(a))is nearly equal to RT12/ΔT.The apparent activation energy(E_(a))values determined by the simple equation(E_(a)≈RT_(12)/ΔT)are similar to those determined by methods of Kissinger and Ozawa.Activation energy(E_(a))results calculated with different data assembles show that E_(a )values have increasing trend with increasing peak temperatures data due to increasing heating rate.The simple equation(E_(a)≈RT_(12)/ΔT)is derived by using limit-calculating method.

关 键 词：胶膜 热分析 固化工艺 固化动力学 极限法 

分 类 号：TQ430.7[化学工程]