首页|乙烯氧基聚氧乙烯醚类保坍型聚羧酸减水剂的合成与应用

乙烯氧基聚氧乙烯醚类保坍型聚羧酸减水剂的合成与应用

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基于分子结构设计原理,以含双键与氧原子直接相连结构的乙烯氧基聚氧乙烯醚为聚合单体,在异抗坏血酸钠/Na2SO3、Fe2+氧化还原体系下,通过与丙烯酸和丙烯酰胺自由基聚合,制备了兼具高保坍性能的聚羧酸减水剂.结果表明:乙烯氧基聚氧乙烯醚由于其碳碳双键与氧原子直接相连,较常规聚醚单体具有更高的聚合活性,诱导期可以缩短近1/2的时间,制得的混凝土与常规减水剂相比,初始、1 h坍落度可分别提高16%和64%,而初始、1 h流动度则提高7%和22%.红外光谱表明功能单体的酰胺、羧基等基团成功嫁接在以聚氧乙烯醚聚合的减水剂分子主链上.
Synthesis and Application of Ethenyloxy-polyoxyethylene Ether Slump Retaining Typed Polycarboxylate Superplasticizer
Based on molecular structure design theory,a polycarboxylic acid superplasticizer with high slump retai-ning performance was prepared by free radical polymerization with acrylic acid and acrylamide in the Redox system of sodium erythorbate/Na2SO3 and Fe2+,using ethenyloxy polyoxyethylene ether with double bond directly connect-ed with oxygen atom as polymeric monomer.The results showed that the ethenyloxy-polyoxyethylene ether has high-er polymerization activity than conventional polyether monomer due to its C =C double bond directly connected with oxygen atom,and the time of induction period can be shortened by nearly 1/2.The initial and 1 h slump of the prepared concrete can be increased by 16% and 64%,respectively,compared with conventional water reducing agents.However,the initial and 1 h slump expansion were 7%and 22%higher.The FT-IR spectra showed that the amide group and carboxyl group of the functional monomers were successfully grafted on the main chain of polycar-boxylic acid superplasticizer.

polyoxyethylene etherethenyloxyslump retainingsuperplasticizer

王舒、吴朱亮、郑建民、张阳、邓益强

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广东石油化工学院化学工程学院,茂名525000

广东省奥克环氧精细化工工程技术研究中心,茂名525000

广东奥克化学有限公司,茂名525000

聚氧乙烯醚 乙烯氧基 保坍型 减水剂

茂名绿色化工研究院"重大创新"类项目广东省科技创新战略专项广东省科技创新战略专项

MMGCIRI-2022YFJH-Z-0012022DZXHT0212021S0008

2024

华南师范大学学报(自然科学版)
华南师范大学

华南师范大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.413
ISSN:1000-5463
年,卷(期):2024.56(3)