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Synthesis of a Novel Polycarboxylate Superplasticizer with Hyperbranched Structure
Author(s) -
Ao Lei,
Zhao Wei,
Lei Qiang,
Wang Dingkai,
Guan Yinshuang,
Liu Kaishuai,
Guo Tiantian,
Fan Xing,
Wei Xianyong
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803393
Subject(s) - monomer , superplasticizer , polymerization , polymer , materials science , polymer chemistry , chemical engineering , molecule , ether , radical polymerization , aqueous solution , infrared spectroscopy , raw material , gel permeation chromatography , chemistry , cement , organic chemistry , composite material , engineering
It is well established that the performance of super‐plasticizer (PCE) is mostly determined by its molecular structure. This research tends to combine PCE with hyperbranched polymer and design PCE molecule structure, aiming to enhance the water‐reducing performance of PCE. Here, a novel PCE with hyperbranched molecular structure (HBPCE) was synthesized through two steps. With diallylamine, methyl propenoate and trihydroxymethylpropane as raw material, firstly, a hyperbranched monomer B was successfully synthesized. Then through free radical polymerization of methylallylpoly oxygenethene ether 2400 (HPEG 2400), propenoic acid (AA) and the monomer B in aqueous solution, the final product HBPCE was obtained. 1 H nuclear magnetic resonance (1H NMR) and infrared spectroscopy (IR) measurements were used for structural characterization, and gel chromatography was used to measure the molecular weight distribution of HBPCE. In addition, performances of HBPCE in cement paste were investigated. It is concluded that HBPCE has a good dispersing effect on cement paste and the water reduction ratio is up to 38.6%.