Reaction Kinetics for Bismaleimide and Barbituric Acid

• Main Authors: Wan-Yun Lin, 林宛韻
• Other Authors: Chorng-Shyan Chern
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/84928659247781714952

碩士 === 國立臺灣科技大學 === 化學工程系 === 101 === 　　This work studird the effect of solvent basicity on the kinetics of N,N’-bismaleimide-4,4-diphenylmethane (BMI) polymerization with Barbituric acid (BTA). This reaction was governed by the competitive Michael addition reaction and free radical addition. Addition of sufficient Hydroquinone (HQ) was used to completely inhibit the free radical polymerization. The system of BMI/BTA = 2/1 (mol/mol) (solid content : 20.46%) was chosen to study the kinetics of Michael addition polymerizations in different aprotic polar solvents. 　　Using DSC and NMR at 383K~423K to obtain the Michael addition reaction kinetic data, then analyzed the data in combinatiob with Michael addition reaction model by Matlab. The activation energy thus obtained in increasing order is NMP (46.12 kJ mole-1)＜DMAC (49.51 kJ mole-1)＜DMF (56.96 kJ mole-1). 　　In addition, kM values determined for 1,3-BTA and BTA at 383K~ 423K in the DMAC show that the value of kM for 1,3-BTA was twice that of BTA, indicating RM = 2 RM,CH.