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Synthesis and characterization of novel poly (N - isopropylacrylamide - co - N,N' - dimethylaminoethyl methacrylate sulfate) hydrogels / Gulten Gurdag in Industrial & engineering chemistry research, Vol. 49 N° 24 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12675-12684 Titre : Synthesis and characterization of novel poly (N - isopropylacrylamide - co - N,N' - dimethylaminoethyl methacrylate sulfate) hydrogels Type de document : texte imprimé Auteurs : Gulten Gurdag, Auteur ; Bestenur Kurtulus, Auteur Année de publication : 2011 Article en page(s) : pp. 12675-12684 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hydrogels Résumé : Poly(N-isopropylacrylamide-co-N,N'-dimethylaminoethyl methacrylate sulfate) [P(NIPAM-co-DMAEMASA)] was prepared from N-isopropylacrylamide (NIPAM) and N,N-dimethylaminoethyl methacrylate sulfate (DMAEMASA) monomers, and its properties were compared with those of poly(N-isopropylacrylamide-co-N,N'-dimethylaminoethyl methacrylate) [P(NIPAM-co-DMAEMA)]. The copolymers were characterized by swelling measurements in distilled water (10-40 °C) and buffer solutions (I = 0.1 M, pH = 2.2-10.0), FTIR, DSC, and SEM methods. The ESV's of the NIPAM-DMAEMASA copolymers in distilled water were 5 times higher than those of P(NIPAM-co-DMAEMA); they decreased with an increase in comonomer (DMAEMASA/DMAEMA) content for both copolymers. While NIPAM-DMAEMASA copolymers did not display any phase transition with temperature, the LCST of the NIPAM-DMAEMA copolymer was determined as 20 °C. Both copolymers displayed a phase transition at pH = 5.0, but the pH of the phase transition for NIPAM-DMAEMA gels shifted to 7.0 with increased DMAEMA content. Glass transition temperatures of NIPAM copolymers did not change with the type and content of comonomer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23692024 [article] Synthesis and characterization of novel poly (N - isopropylacrylamide - co - N,N' - dimethylaminoethyl methacrylate sulfate) hydrogels [texte imprimé] / Gulten Gurdag, Auteur ; Bestenur Kurtulus, Auteur . - 2011 . - pp. 12675-12684. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12675-12684 Mots-clés : Hydrogels Résumé : Poly(N-isopropylacrylamide-co-N,N'-dimethylaminoethyl methacrylate sulfate) [P(NIPAM-co-DMAEMASA)] was prepared from N-isopropylacrylamide (NIPAM) and N,N-dimethylaminoethyl methacrylate sulfate (DMAEMASA) monomers, and its properties were compared with those of poly(N-isopropylacrylamide-co-N,N'-dimethylaminoethyl methacrylate) [P(NIPAM-co-DMAEMA)]. The copolymers were characterized by swelling measurements in distilled water (10-40 °C) and buffer solutions (I = 0.1 M, pH = 2.2-10.0), FTIR, DSC, and SEM methods. The ESV's of the NIPAM-DMAEMASA copolymers in distilled water were 5 times higher than those of P(NIPAM-co-DMAEMA); they decreased with an increase in comonomer (DMAEMASA/DMAEMA) content for both copolymers. While NIPAM-DMAEMASA copolymers did not display any phase transition with temperature, the LCST of the NIPAM-DMAEMA copolymer was determined as 20 °C. Both copolymers displayed a phase transition at pH = 5.0, but the pH of the phase transition for NIPAM-DMAEMA gels shifted to 7.0 with increased DMAEMA content. Glass transition temperatures of NIPAM copolymers did not change with the type and content of comonomer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23692024