高温缓凝剂AMCT的合成及其性能评价
发布时间：2018-12-10 19:51
【摘要】：以甲基丙烯磺酸钠(MAS)、含亲水长链的烯类单体(CL)、丙烯酸(AA)和烯丙基三甲基氯化铵(TMAAC)为原料,合成了一种高温缓凝剂(AMCT)。通过正交实验得到的最佳合成条件为:n(AA)∶n(MAS)∶n(CL)∶n(TMAAC)=4.0∶1.0∶0.15∶0.10,引发剂(NH4)2S2O8加量为单体总质量的4%,单体质量浓度300 g/L,反应温度85℃,反应时间24 h。利用IR和~1HNMR表征了AMCT的结构。采用TGA考察了AMCT的耐温性能。以稠化时间考察了AMCT的温度敏感性和加量敏感性。通过AMCT对水泥浆流变性能的影响说明其分散性和稳定性。通过XRD、EDTA滴定和低场核磁等方法分析了AMCT的缓凝机理。结果表明:AMCT的分解温度为255℃;AMCT的温度敏感性和加量敏感性均符合行业标准要求;AMCT对水泥浆分散性和稳定性无不良影响;AMCT的缓凝机理为自匹配吸附形成包覆层控制水化作用、抑制晶体生长作用和络合作用。
[Abstract]:A kind of high temperature retarder (AMCT). Was synthesized from (CL), acrylic acid (AA) and allyl trimethylammonium chloride (TMAAC), which contains hydrophilic and long chain of sodium methallyl sulfonate (MAS),. The optimum synthetic conditions obtained by orthogonal experiment are as follows: n (AA): n (MAS): n (CL): n (TMAAC) = 4.0: 1.0: 0.15: 0.10, the amount of initiator (NH4) 2S2O8 is 4% of the total mass of monomer, The monomer concentration was 300 g / L, the reaction temperature was 85 鈩，
本文编号：2371109
[Abstract]:A kind of high temperature retarder (AMCT). Was synthesized from (CL), acrylic acid (AA) and allyl trimethylammonium chloride (TMAAC), which contains hydrophilic and long chain of sodium methallyl sulfonate (MAS),. The optimum synthetic conditions obtained by orthogonal experiment are as follows: n (AA): n (MAS): n (CL): n (TMAAC) = 4.0: 1.0: 0.15: 0.10, the amount of initiator (NH4) 2S2O8 is 4% of the total mass of monomer, The monomer concentration was 300 g / L, the reaction temperature was 85 鈩，
本文编号：2371109
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