Page 192 - 精细化工2019年第12期
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·2520·                            精细化工   FINE CHEMICALS                                  第 36 卷

            TPEG 为原料,在路易斯酸催化剂作用下,合成了                           [3]   Liao Guosheng (廖国胜), Wang Jinsong (王劲松), Ma Baoguo (马保
            改性的木质素聚氧乙烯醚(KL-TPEG),进一步将                              国), et al . Study on several key problems in the synthesis of new
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            KL-TPEG 与 TPEG、丙烯酸等单体进行共聚合,制                           Building Materials (建材世界), 2004, 25(2): 48-50.
            得木质素含量不同的系列聚合物 PCE-Ls。                             [4]   Yamada K, Ogawa S, Hanehara S. Controlling of the adsorption and
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            后聚氧乙烯醚大单体及合成的聚羧酸减水剂进行了                                 2001, 31(2): 375-383.
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            研究证明,改性减水剂的表面活性与改性聚氧乙烯                             [6]   Tan  Hongbo  (谭洪波).  Research  and  application  of  functionally
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            醚含量呈正相关性,改性聚氧乙烯醚大单体的表面
                                                                   of  Technology (武汉理工大学), 2009.
            张力为 36.01 mN/m,远低于 TPEG 的 58.73 mN/m。              [7]   Li Shun (李顺), Yu Qijun (余其俊), Wei Jiangxiong (韦江雄), et al.
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            高,且木质素含量越高,PCE-Ls 的引气性越好。                              Ceramic Society (硅酸盐学报), 2011, 39(1): 80-86.
                (5)粒径分布测试结果表明,PCE-Ls 呈支化爪                      [8]   Ma B, Ma M, Shen X, et al. Compatibility between a polycarboxylate
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            型结构,分子量更小,但在团聚时由于刚性木质素
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            分子的支撑作用,使其团聚后呈现出较大的体积。                                 Materials 2014, 51: 47-54.
            因此,改性后的减水剂在水泥浆体中具有更大的空                             [9]   Lei L, Plank J. A study on the impact of different clay minerals on
                                                                   the dispersing force of conventional and modified vinyl ether based
            间位阻,使水泥颗粒难以聚集,因此,难以泌水离                                 polycarboxylate superplasticizers[J]. Cement and Concrete Research,
            析,具有较好的和易性。                                            2014, 60: 1-10.
                (6)通过研究 0.15%减水剂掺量下的水泥净浆                       [10]  Pourchet S, Liautaud S, Rinaldi D, et al. Effect of the repartition of
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            流动度损失情况发现,PCE-Ls 的初始流动度均高于                             PCP in presence of sulfate[J]. Cement and Concrete Research, 2012,
            PCE-B;通过混凝土的分散性实验得出,PCE-Ls 分                           42: 431-439.
                                                               [11]  Plank  J,  Zhimin  D,  Keller  H,  et al.  Fundamental  mechanisms  for
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                                                                   polycarboxylate intercalation into C 3A hydrate phases and the role of
            这与 PCE-Ls 的特殊爪状结构、较好的表面活性和                             sulfate present in cement[J]. Cement and Concrete Research, 2010,
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                (7)流变性能测试和 Herschel-Bulkley 拟合模                    superplasticizer  by  graft  sulfonation  and  investigation  of  the  dispersive
            型结果表明,PCE-Ls 分散的水泥浆体具有更低的屈                             performance and mechanism in a cementitious system[J]. Industrial
            服应力和更好的稳定性;Bingham 拟合模型表明,                             and Engineering Chemistry Research, 2013, 52: 16101-16109.
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            聚羧酸减水剂显示出良好的混凝土应用性能,为木                                 Matter, 2015, 11: 2691-2699.
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