本文選題：高效減水劑　切入點(diǎn)：三聚氰胺　出處：《中國膠粘劑》2015年12期

【摘要】：以三聚氰胺(M)、水楊酸(SA)和甲醛(F)為原料,亞硫酸氫鈉(SB)為磺化劑,采用四步合成法制備了SMSAF(磺化三聚氰胺-水楊酸-甲醛樹脂)高效減水劑。系統(tǒng)探討了合成工藝條件對(duì)SMSAF減水劑分散性的影響。研究結(jié)果表明:當(dāng)n(M)∶n(SA)∶n(F)∶n(SB)=1∶0.1∶3.9∶1.3,羥甲基化階段的反應(yīng)溫度為70℃、反應(yīng)時(shí)間為1 h和p H為8.5,磺化階段的反應(yīng)溫度為85℃、反應(yīng)時(shí)間為3 h和p H為12,酸性縮聚階段的反應(yīng)溫度為60℃、反應(yīng)時(shí)間為1 h和p H為4,堿性重整階段的反應(yīng)溫度為85℃、反應(yīng)時(shí)間為1 h和p H為8.5時(shí),合成的SMSAF減水劑綜合性能良好;當(dāng)w(SMSAF)=1.0%(相對(duì)于水泥質(zhì)量而言)時(shí),混凝土體系具有良好的分散性,水泥凈漿初始流動(dòng)度(達(dá)249 mm)相對(duì)最大。
[Abstract]:In this paper, melamine (M), salicylate (SA) and formaldehyde (F) were used as raw materials and sodium bisulfite (SBSO) as sulfonating agent. SMSAF (sulfonated melamine salicylic acid-formaldehyde resin) superplasticizer was prepared by a four step synthesis method. The effects of synthetic conditions on the dispersity of SMSAF water reducer were systematically discussed. The results show that the hydroxy methylation order of SMSAF is as follows: 1: 1: 0.1: 3. 9: 1.3. The reaction temperature is 70 鈩，

本文編號(hào)：1665364