酸酐與甲氧基聚乙二醇的酯化反應及產物的減水性能研究

生物工程論文編號:SW073  論文字數:9167,頁數:27

目  錄
中文摘要 I
英文摘要 II
目錄 III
1. 緒論 1
 1.1 課題研究內容及意義 1
 1.2 文獻綜述 2
 1.3 課題的提出 4
2. 實驗部分 6
 2.1 試驗材料  6
      2.2  實驗設備 6
 2.3  實驗方法 6
3. 結果與討論 9
     3.1 結構分析   9
      3.2 酯化率的影響因素 12
 3.3 無催化劑單酯化的反應動力學 16
 3.4 減水效果分析 18
4. 總結與展望 20
致謝 21
參考文獻 22

摘 要：本文研究了甲氧基聚乙二醇（MPEG）和酸酐（馬來酸酐或鄰苯二甲酸酐）單酯化反應的工藝條件，詳細探討了了溫度，原料配比， MPEG分子量,催化劑用量,反應時間等因素對反應酯化率的影響。發現溫度為90℃時，MPEG分子量為1300，投料比為1：1.15，催化劑為2%時轉化效果好。采用紅外分析確定了產物結構。討論了反應動力學，計算了活化能，鄰苯二甲酸酐酯化反應的活化能高于馬來酸酐酯化反應。同時初步研究了酯化產物在水泥中作為減水劑的效果，并發現有明顯的減水效果。

關鍵詞：馬來酸酐；鄰苯二甲酸酐；甲氧基聚乙二醇；酯化反應；小分子減水劑
Esterification of Anhydride and Methoxyl Polyethylene Glycol Ether and Water-reducing Performance of Its Product

Abstract: This article studied the reaction conditions of mono-esterification from methoxy polyethylene glycol(MPEG) and anhydride (maleic anhydride , phthalic anhydride ).The effect of the MPEG molecular weight, the amount of catalyst, reaction time ,the temperature and feed ratio on the esterification rate was discussed in details. It is found that conditions such as MPEG molecular weight, the amount of catalyst ,reaction time, feed ratio and temperature is 1300, 2%, 120 min ,1：1.15 and 90℃ respectively, the esterification rate reaches high level. The structure of product is characterized by IR analysis. The kinetics of the reaction is discussed and the activation energy is calculated. The activation energy of the esterification of phthalic anhydride is higher then the activation energy of maleic anhydride. Meanwhile the esterification product show some function as water-reducing agent in cement.
Keywords: Maleic anhydride; Phthalic anhydride; Methoxy polyethylene glycol;  Esterification;  Small water-reducing agent