末端為羧基的小分子減水劑的合成及性能研究

生物工程論文編號:SW081  論文字數:14663,頁數:39

目  錄

中文摘要 I
英文摘要 II
目錄 III
1．緒論 1
   1.1 混凝土材料和技術發展的歷程 1
   1.2 高性能減水劑的作用 2
   1.3 高性能減水劑對混凝土性能的影響 3
   1.4 高性能減水劑的分類及其特征 3
   1.5 高性能減水劑的研究 4
   1.6 小分子減水劑的研究 6
2．實驗部分 9
   2.1 原料和儀器 9
   2.2 實驗步驟 9
3．結果與討論 12
   3.1產物外光譜分析 12
   3.2不同因素對酯化反應的影響 14
   3.3 無催化劑單酯化的反應活化能 17
 　3.4 正交實驗分析 18
   3.5減水效果分析 20
4．總結與展望 21
致謝 22
參考文獻 23

摘 要：甲氧基聚乙二醇（MPEG）與鄰苯二甲酸酐單酯化反應可以用來作小分子減水劑。本文研究了該反應的工藝條件，詳細考察了反應時間、溫度、MPEG分子量、投料比以及催化劑等因素對反應酯化率的影響，通過紅外表征了酯化產物的結構，對反應結果進行了正交分析，計算了反應活化能，初步研究了酯化產物作為小分子減水劑在水泥中的應用效果。

關鍵詞：甲氧基聚乙二醇；鄰苯二甲酸酐；酯化反應；小分子減水劑

Synthesis and Performance of Small Water-Reducing Agent with Carboxyic End Group

Abstract: Esterification from methoxy polyethylene glycol(MPEG) and o-phthalic anhydride were used to small water-reducing agent.The reaction coditions of esterification were studied in this article. The effects of time, temperature, molecular weight of MPEG and feed ratio on the esterificat rate of methoxy polyethylene glycol and o-phthalic anhydride were investigated in detail, and then the optimum reaction condition was determine . The struture of products was characterizated by IR, and orthogonal analysis the result of  esterification, Calculate activation energy , meanwhile the application of esterificate products as small water-reducing agent was explored.

Keywords：Methoxy polyethylene glycol; O-phthalic anhydride; Esterification;Small water-reducing agent