聚羧酸在水泥表面覆盖面积对分散性能的影响

被引：3

作者：

王秀梅

杨勇

舒鑫

冉千平

机构：

[1] 高性能土木工程材料国家重点实验室江苏苏博特新材料股份有限公司

来源：

功能材料 | 2017年 / 48卷 / 11期

关键词：

聚羧酸(PC); 溶液构象; 吸附层厚度; 吸附量; 分散性能;

D O I：

暂无

中图分类号：

TU528.042.2 [减水剂];

学科分类号：

摘要：

通过自由基热聚合和可逆加成-断裂链转移法合成了不同主链刚柔性、不同序列结构分布的聚羧酸(polycarboxylate superplasticizer,PC)模型分子,系统的考察了PC分子结构与溶液构象、吸附性能以及宏观性能(如分散性能、流变性能)的关系,发现不同结构的PC宏观分散性能的差异主要来自于PC在水泥颗粒表面覆盖面积的差别。而PC的表面覆盖面积由两方面决定,一方面PC在水泥颗粒表面的单分子吸附层厚度;另一方面是PC在水泥颗粒表面的吸附量。单分子吸附层厚度越厚,在水泥颗粒表面的吸附量越大,PC在水泥颗粒表面的覆盖面积越大,对水泥浆体的分散性能越好。

引用

页码：11081 / 11085

页数：5

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