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缓释型聚羧酸减水剂的分子结构设计及制备
Molecular Structure Design and Preparation of Slow Release Polycarboxylic Superplasticizer
投稿时间:2016-06-12  修订日期:2016-07-19
DOI:103969/j.issn.1007 9629201704012
中文关键词:  缓释型聚羧酸  分子结构设计  数学模型
英文关键词:slow release polycarboxylate  molecular structure design  mathematical model
基金项目:
              
作者单位
宋作宝
SONG Zuobao
中建材中岩科技有限公司,北京100024
CNBM Zhongyan Technology Co., Ltd., Beijing 100024, China
姚燕
YAO Yan
中国建筑材料科学研究总院,北京100024
CNBM Zhongyan Technology Co., Ltd., Beijing 100024, China
李婷
LI Ting
中建材中岩科技有限公司,北京100024
CNBM Zhongyan Technology Co., Ltd., Beijing 100024, China
李晓宁
LI Xiaoning
中建材中岩科技有限公司,北京100024
CNBM Zhongyan Technology Co., Ltd., Beijing 100024, China
吴明慧
WU Minghui
中建材中岩科技有限公司,北京100024
CNBM Zhongyan Technology Co., Ltd., Beijing 100024, China
摘要点击次数: 209
全文下载次数: 
中文摘要:
      基于2甲基丙2烯基聚乙二醇醚丙烯酸(HPEGAA)体系研究了接枝密度、主链聚合度及侧链长度对聚羧酸减水剂(PCE)净浆流动度的影响,建立了PCE理想分子结构的数学模型,研究了酯基密度对PCE性能的影响.采用相对分子质量为4000的HPEG设计并制备出2种缓释型减水剂PCR1和PCR2对缓释型PCE的分子结构进行了表征,采用凝胶色谱仪(GPC)测定了其重均相对分子质量和数均相对分子质量,用红外光谱表征了其官能团.研究了掺缓释型PCE的新拌混凝土性能和硬化混凝土性能,验证了所建数学模型和设计方法的正确性.
英文摘要:
      The influence of grafting density, the main chain polymerization degree and side chain length on polycarboxylate superplasticizer(PCE) cement paste fluidity for allyl polyoxyethylene ether acrylic acid(HPEG AA) was studied. The mathematical model of the PCE optimum molecular structure was established, and the effect of the ester group density on the properties of PCE was studied. Basing on the above conclusion, two kinds of PCE were designed and prepared using HPEG with relative molecular mass of 4000:PC R1 which released quickly and PC R2 which released slowly. The molecular structure of PCE was characterized. The molecular weight of PCE was determined by gel permeation chromatograph(GPC), and the functional groups of PCE were characterized by infrared spectroscopy(IR). The properties of the fresh concrete and hardened concrete with slow release PCE were determined, and the mathematical model and the design method was validated as well.
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