混凝土高效減水劑的合成

材料科學論文編號:CL020  論文字數:11571,頁數:22

 目  錄
中文摘要……………………………………………………………………………Ⅰ
英文摘要……………………………………………………………………………Ⅱ
目錄…………………………………………………………………………………Ⅲ
1 緒論 …………………………………………………………………………………1
   1.1 研究應用的現狀與意義………………………………………………………1
   1.2 定義與分類……………………………………………………………………3
   1.3 性能特點………………………………………………………………………3
   1.4 聚羧酸系高性能減水劑的分子結構…………………………………………5
   1.5 聚羧酸系減水劑的作用機理…………………………………………………6
       1.5.1 空間位阻作用…………………………………………………………6
       1.5.2 靜電斥力作用…………………………………………………………6
       1.5.3 吸附層作用……………………………………………………………6
   1.6 聚羧酸系減水劑的合成………………………………………………………7
       1.6.1 合成方法………………………………………………………………7
       1.6.2 合成控制………………………………………………………………7
2   實驗部分 …………………………………………………………………………9
   2.1 實驗材料………………………………………………………………………9
       2.1.1 減水劑的合成材料……………………………………………………9
       2.1.2 減水劑的測試材料……………………………………………………9
   2.2 實驗設備與儀器………………………………………………………………9
       2.2.1 合成步驟的設備與儀器………………………………………………9
       2.2.2 測試步驟的設備與儀器 ……………………………………………10
   2.3 實驗工藝 ……………………………………………………………………10
       2.3.1 減水劑的制備方法 …………………………………………………10
       2.3.2 減水劑的測試方法 …………………………………………………10
3 結果與討論…………………………………………………………………………12
   3.1APEG25系列……………………………………………………………………12
       3.1.1MA單體對減水劑的影響………………………………………………12
       3.1.2APEG25投料方式的影響………………………………………………12
       3.1.3對苯乙烯磺酸鈉的影響………………………………………………13
   3.2 MPEG2000系列 ………………………………………………………………13
       3.2.1反應溫度對減水劑性能的影響………………………………………13
       3.2.2聚合工藝對減水劑性能的影響………………………………………13
       3.2.3鏈轉移劑量的影響……………………………………………………14
       3.2.4引發劑量的影響………………………………………………………14
       3.2.5單體濃度的影響………………………………………………………14
4 總結與展望…………………………………………………………………………15
致  謝…………………………………………………………………………………16                                             
參考文獻………………………………………………………………………………17

摘要：本文介紹了國內外聚羧酸系混凝土高性能減水劑的研究發展現狀,介紹了聚羧酸類高性能減水劑的分子結構特征及合成方法,對于聚羧酸系高效減水劑的不同合成技術的優缺點進行了分析.認為制備具有聚合活性的大單體的技術是聚羧酸高性能減水劑需要解決的緊迫問題。重點通過不同減水劑的合成工藝步驟等分析了減水劑性能的影響因素。如MPEG2000系列增加反應過程中的固含量造成減水劑凈漿流動度降低，增加了共聚物分子量，不利于聚羧酸系減水劑的性能；APEG25系列中，APEG25單體作打底比作滴加組分更有利于聚羧酸系減水劑的流動性。對于鏈轉移劑量，MPEG2000說明了增加鏈轉移量有利于減水劑的流動性。增加單體濃度對流動性有不利的影響；MPEG系列合適反應溫度為65℃；APEG25系列比MPEG2000系列減水劑的流動性和保持性都要好。
關鍵詞：聚羧酸;高效;減水劑

Abstract: TThis cluster of carboxylic acid introduced the research development present stuation, the introduction of carboxylic acid high-performance jianshuiji molecular structure feature and synthetic method for clustering of carboxylic acid and superplasticizer the advantages and disadvantages of different synthesis technology is analyzed. Think big preparation monomer activity has been high technology carboxylic acid water-reducing agent needs to solve urgent problems.the focus through the different steps Superplasticizer synthesis of water-reducing agent such as an analysis of the performance factor. If MPEG2000 series increase the reaction process of solid content slurry flow caused jianshuiji clean, reduce weight, which increased copolymer of clustering performance of carboxylic acid water-reducing agent, APEG25 series, APEG25 monomer as compared to add color to fasten carboxylic acid components together water-reducing agent liquidity. For that, MPEG2000 chain transfer dose volume increases water-reducing agent for the chain of liquidity. Add monomer concentration of liquidity has adverse effects, The MPEG series suitable for 65 ° c, reaction temperature, APEG25 than MPEG2000 series jianshuiji series of liquidity and stable.
Keywords: polycarboxylate, efficient and superplasticizerSynthesis of concrete water reducer