Effects of an amphoteric copolymer on the properties of cementitious materials

The effects of an amphoteric copolymer, poly(acrylamide‐co‐(2‐(3‐carboxyacryloyloxy)‐N‐(carboxymethyl)‐N,N‐dimethyl‐ethanaminium) (PAC) on the properties of cement pastes or mortars were investigated. PAC was prepared from acrylamide and 2‐(3‐carboxy‐acryloyloxy)‐N‐(carboxymethyl)‐N,N‐dimethylethana...

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Bibliographic Details
Published in:Journal of applied polymer science 2012-05, Vol.124 (3), p.2318-2324
Main Authors: Sheen, Yeong-Nain, Ho, Chung-Da, Weng, Wei-Hung, Hsu, Kung-Chung
Format: Article
Language:English
Subjects:
amphoteric copolymer
Applied sciences
Buildings. Public works
cement
compressive strength
Exact sciences and technology
length change
Materials
Materials science
Miscellaneous (including polymer concrete, repair and maintenance products, etc.)
Organic polymers
Physicochemistry of polymers
Polymers
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
setting
water reduction
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Summary:The effects of an amphoteric copolymer, poly(acrylamide‐co‐(2‐(3‐carboxyacryloyloxy)‐N‐(carboxymethyl)‐N,N‐dimethyl‐ethanaminium) (PAC) on the properties of cement pastes or mortars were investigated. PAC was prepared from acrylamide and 2‐(3‐carboxy‐acryloyloxy)‐N‐(carboxymethyl)‐N,N‐dimethylethanaminium (CAC) through free radical polymerization. The results indicate that the presence of the polymer delayed the setting of cement pastes; it also reduced the water demand so that the resulting mortars showed improved compressive strength and reduced length change. PAC with about 16.7% CAC and a weight‐average molecular weight of about 5 × 104 was effective in promoting the material properties of mortars. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
ISSN:0021-8995
1097-4628
DOI:10.1002/app.35284