以过硫酸铵(APS)为引发剂,N-氨基甲酰马来酸(NCMA)、聚乙二醇单烯丙基醚(APEG)和甲基丙烯磺酸钠(SMAS)为聚合单体,合成N-氨基甲酰马来酸-甲基丙烯磺酸钠-聚乙二醇单烯丙基醚(SP).通过FT-IR和1 H-NMR谱图对SP结构进行表征.以净浆流动度为指标,考察了引发剂用量、反应温度、SMAS/APEG物质的量比和NCMA/APEG物质的量比对净浆流动度的影响.结果表明:最佳反应条件为SMAS/APEG物质的量比1.2、NCMA/APEG物质的量比1.0、引发剂用量0.4％(质量分数)和反应温度50℃.以最佳反应条件制备的SP具有较好的工作性能和分散效果,掺量为0.2％(质量分数)时,减水率达25.7％,净浆流动度达311 mm.
参考文献
| [1] | 苏瑜,庞浩,王斌,蒋冰艳,张磊,廖兵.聚羧酸系混凝土减水剂的研究--大分子单体的制备与表征[J].精细化工,2012(02):187-191. |
| [2] | 卞荣兵,沈健.聚羧酸混凝土高效减水剂的合成和研究现状[J].精细化工,2006(02):179-182. |
| [3] | Johann Plank;Dai Zhimin;Helena Keller .Fundamental mechanisms for polycarboxylate intercalation into C_3A hydrate phases and the role of sulfate present in cement[J].Cement and Concrete Research,2010(1):45-57. |
| [4] | Zhang DF;Ju BZ;Zhang SF;Yang JZ .Dispersing mechanism of carboxymethyl starch as water-reducing agent[J].Journal of Applied Polymer Science,2007(2):486-491. |
| [5] | Yi S Y;Hung L H;Kung C H .A water-soluble acrylate/sulfonate copolymer.Ⅰ.Its synthesis and dispersing ability on cement[J].Journal of Applied Polymer Science,2006,100:2490. |
| [6] | Yutaka N;Takaharu G;Kazuo Y .A practical model for the interactions between hydrating portland cement and poly-β-naphthalene sulfonate condensate superplasticizers[J].Journal of the American Ceramic Society,2005,88(4):850. |
| [7] | Ma X X .Synthesis of new polyether polycarboxylate superplasticizer[J].J Wuhan University of Technology:Mater Sci Ed,2010,25(5):799. |
| [8] | 易聪华,黄欣,张智,杨东杰.聚羧酸减水剂的合成及其分散性能[J].精细化工,2011(07):719-722. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%