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Characterization of carboxylated poly(butyl acrylate) latices produced by a semibatch process
Author(s) -
Chern C. S.,
Lin F. Y.,
Chen Y. C.,
Lin C. H.
Publication year - 1996
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(19961017)62:3<585::aid-app16>3.0.co;2-y
Subject(s) - acrylate , polymer chemistry , characterization (materials science) , polymer science , materials science , butyl acrylate , chemical engineering , process (computing) , composite material , copolymer , polymer , nanotechnology , engineering , computer science , operating system
Several carboxylated poly(butyl acrylate) latices prepared by a semibatch emulsion poly‐merization process were characterized in this study. A significant amount of polyelectrolyte was found in the latex product containing 10% AA, designated as AA10. On the other hand, latices containing 0.1% AA (AA0.1), 0.1% MAA (MAAC.1), and 10% MAA (MAA10) showed very low levels of polyelectrolyte in water. Based on the critical flocculation concentration data, it can be concluded that incorporation of 10% AA or 10% MAA into the emulsion polymers can greatly improve the chemical stability of the latex products, especially at higher pH. The data of the pH and conductometric titration experiments show that the MAA unit can be distributed more uniformly in the latex particles in comparision with the AA unit. This result is further confirmed by determination of the T g 's of the emulsion polymers by means of thermally stimulated current (TSC). © 1996 John Wiley & Sons, Inc.