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Water‐soluble sulfonated phenolic resins. III. Effects of degree of sulfonation and molecular weight on concrete workability
Author(s) -
Hsu KungChung,
Chen ShengDa,
Su Nan
Publication year - 2000
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/(sici)1097-4628(20000620)76:12<1762::aid-app5>3.0.co;2-v
Subject(s) - cementitious , materials science , compressive strength , cement , composite material , phenol , formaldehyde , phenol formaldehyde resin , chemical engineering , polymer chemistry , chemistry , organic chemistry , engineering
The effects of the degree of sulfonation (DS) and molecular weight (MW) of sulfonated phenolic resins (SPF) on the flow properties of cementitious materials were investigated. SPF resin was prepared from phenol, formaldehyde, and sodium bisulfite through a four‐step reaction. It was found that an increase in either DS or MW would enhance the dispersion effects in the system. The results indicate that the fluidity of cement pastes and the workability of concrete increased with higher DS until the resin was fully sulfonated. For resins with sufficient sulfonation, the performance of cementitious materials would increase with increasing MW. Apparently, resins with MW of about 3 × 10 4 are most effective in promoting concrete properties in terms of workability and compressive strength. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 1762–1766, 2000