研究生: |
林宛韻 Wan-Yun Lin |
---|---|
論文名稱: |
雙馬來醯亞胺/巴比妥酸之反應動力學研究 Reaction Kinetics for Bismaleimide and Barbituric Acid |
指導教授: |
陳崇賢
Chorng-Shyan Chern |
口試委員: |
黃延吉
Yan-Jyi Huang 許榮木 Jung-Mu Shu |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2013 |
畢業學年度: | 101 |
語文別: | 中文 |
論文頁數: | 111 |
中文關鍵詞: | 雙馬來醯亞胺 、巴比妥酸 、溶劑效應 、麥克加成反應 |
外文關鍵詞: | Bismaleimide, Barbituric Acid, Solvent effect, Michael addition reaction |
相關次數: | 點閱:464 下載:0 |
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本研究主要研究在不同鹼性溶劑下,使用雙馬來醯亞胺(N,N’-bismaleimide-4,4-diphenylmethane, BMI)與巴比妥酸(Barbituric acid, BTA)進行聚合反應之反應動力學,此反應同時存在麥克加成反應(Michael addition)以及自由基加成反應(Free radical addition)兩種反應機制,由文獻得知足量之對苯二酚(Hydroquinone, HQ)將可有效抑制自由基加成反應。利用此系統再針對不同非質子極性溶劑,令BMI/BTA莫爾比為2:1(固含量:20.46%),使麥克加成反應作為主反應,進行反應動學之研究。
使用微分式掃描熱量分析儀(DSC)與核磁共振儀(NMR),在383K∼423K得到此麥克加成反應之反應動力學數據,將實驗所得數據利用Matlab數學軟體分析麥克加成之推倒公式,模擬出之kM再利用Arrhenius方程式計算BMI/BTA麥克加成反應之活化能Ea,不同溶劑Ea大小順序為NMP (46.12 kJ mole-1)<DMAC (49.51 kJ mole-1)<DMF (56.96 kJ mole-1)。
另外使用1,3–二甲基巴比妥酸(1,3-BTA)與BTA在DMAC溶劑反應做比較,最後實驗所得之kM數據,在383K∼423K 之kM為1,3-BTA是BTA的兩倍,也就是麥克加成反應速率可以表示為RM = 2 RM,CH。
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.
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