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Synthesis and characterization of a PAMAM dendrimer‐based superplasticizer and its effect on the properties in cementitious system
Author(s) -
Zhao Hongwei,
Liao Bing,
Nian Fuwei,
Zhao Yangyang,
Wang Kun,
Pang Hao
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46550
Subject(s) - superplasticizer , materials science , cementitious , compressive strength , dendrimer , dispersion (optics) , cement , fourier transform infrared spectroscopy , composite material , chemical engineering , polymer chemistry , physics , optics , engineering
In this work, a polyamidoamine dendrimer‐based polycarboxylic superplasticizer (DPC) with a crosslinked emanative structure was synthesized via simple free radical polymerization. 1 H‐nuclear magnetic resonance and Fourier transform infrared spectroscopy measurements were used for structural characterization. The fluidity, rheology behavior, and compressive strength of the cement/DPC samples were investigated in detail. The DPCs performed better dispersion and dispersion maintaining capabilities, stronger water reduction capability, and higher adsorption amounts than the conventional comb‐shaped superplasticizer. The dispersive capacity of the DPC increased with an increasing generation of polyamidoamine dendrimers. Besides, compared with conventional comb‐shaped superplasticizer, the addition of DPC led to a delayed and lowered heat flow peak on the hydration of cement paste at early age of hydration process. Furthermore, compressive strength results showed that the cement/DPC samples performed higher compressive strength than blank cement samples. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46550.