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Swelling properties of pH‐responsive hydrophobically modified hydrogels of poly(methacrylic acid‐co‐diallylammonium salt) in aqueous solution
Author(s) -
Gao DangGe,
Ma JianZhong,
Guo HaiQing
Publication year - 2012
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.2071
Subject(s) - self healing hydrogels , methacrylic acid , poly(methacrylic acid) , comonomer , alkyl , polymer chemistry , aqueous solution , monomer , swelling , copolymer , chemistry , polyelectrolyte , ammonium , radical polymerization , materials science , organic chemistry , polymer , composite material
Using diallylmethyl alkyl ammonium salts (CCX) (X is alkyl's chain length, represents 12, 14, 16, and 18, respectively) as a comonomer of methacrylic (MAA), hydrophobically modified hydrogels of poly diallylmethyl alkyl ammonium salts‐methacrylic acid (PCCX‐MAA) were prepared by free radical copolymerization in aqueous solution. The synthetic conditions, such as dosage of cross‐linking agent, reaction concentration and length of alkyl chain were studied in detail. Results indicated that the swelling degree of hydrogels was decreased with dosage of cross‐linking agent, or monomer concentration increased at different pH. Incorporation of the different length of alkyl chain hydrophobic CCX units on PMAA chains by random distribution can change reswelling kinetics. The required time for reaching equilibrium swelling state was longest for PCC16‐MAA. Copyright © 2011 John Wiley & Sons, Ltd.