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Effects of an amphoteric copolymer on the properties of cementitious materials
Author(s) -
Sheen YeongNain,
Ho ChungDa,
Weng WeiHung,
Hsu KungChung
Publication year - 2011
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.35284
Subject(s) - copolymer , mortar , acrylamide , cementitious , materials science , cement , compressive strength , polymer , composite material , polymerization , radical polymerization , polymer chemistry , chemical engineering , engineering
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 × 10 4 was effective in promoting the material properties of mortars. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012