HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES

The synthesis of copolymer hydrogels of JV, W-dimethylacrylamide (NNDMAAm) with 2-acrylamido-2-methyl- 1-propanesulfonic acid (AMPS) were prepared by solution free radical polymerization at different feed mole ratios (mole ratios of nNNDMAAm/nAMps = 0.5/0.5; 0.33/0.66; 0.66/0.33; 0.25/0.75; 0.75/0.2...

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Autores principales:	POOLEY,S. AMALIA, RIVAS,BERNABÉ L, CÁRCAMO,AMITZA L, PIZARRO,GUADALUPE DEL C
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	Copolymerization gels swelling water absorption
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200008
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spelling	oai:scielo:S0717-970720080002000082009-06-09HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIESPOOLEY,S. AMALIARIVAS,BERNABÉ LCÁRCAMO,AMITZA LPIZARRO,GUADALUPE DEL C Copolymerization gels swelling water absorption The synthesis of copolymer hydrogels of JV, W-dimethylacrylamide (NNDMAAm) with 2-acrylamido-2-methyl- 1-propanesulfonic acid (AMPS) were prepared by solution free radical polymerization at different feed mole ratios (mole ratios of nNNDMAAm/nAMps = 0.5/0.5; 0.33/0.66; 0.66/0.33; 0.25/0.75; 0.75/0.25). In this reaction ammonium persulfate (APS) and N,N'-methylene-bis-acrylamide (MBA) were used as initiator and cross-linking reagents respectively. These copolymers were insoluble in water and it were characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Aqueous solutions of the copolymers showed lower critical solution temperature behavior (LCST). The phase transition temperatures of aqueous solutions of these copolymers increased with increasing of hydrophilic AMPS comonomer content in the copolymers. The effects of reaction parameters, including the concentration of cross-linking reagent, the monomer concentration, pH, temperature, salt solutions, and solvent polarity on the water absorption have been also studied. Under the experimental conditions, the copolymer poly(NNDMAAm-co-AMPS) with a feed mol ratio 1:2 presents the best swelling properties. The monomer reactivity ratios for poly(NNDMAAm-co-AMPS) are the following: r1 = 0.217 and r2 = 2.20, (r1 x r2 = 0.48).info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.2 20082008-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200008en10.4067/S0717-97072008000200008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Copolymerization gels swelling water absorption
spellingShingle	Copolymerization gels swelling water absorption POOLEY,S. AMALIA RIVAS,BERNABÉ L CÁRCAMO,AMITZA L PIZARRO,GUADALUPE DEL C HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES
description	The synthesis of copolymer hydrogels of JV, W-dimethylacrylamide (NNDMAAm) with 2-acrylamido-2-methyl- 1-propanesulfonic acid (AMPS) were prepared by solution free radical polymerization at different feed mole ratios (mole ratios of nNNDMAAm/nAMps = 0.5/0.5; 0.33/0.66; 0.66/0.33; 0.25/0.75; 0.75/0.25). In this reaction ammonium persulfate (APS) and N,N'-methylene-bis-acrylamide (MBA) were used as initiator and cross-linking reagents respectively. These copolymers were insoluble in water and it were characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Aqueous solutions of the copolymers showed lower critical solution temperature behavior (LCST). The phase transition temperatures of aqueous solutions of these copolymers increased with increasing of hydrophilic AMPS comonomer content in the copolymers. The effects of reaction parameters, including the concentration of cross-linking reagent, the monomer concentration, pH, temperature, salt solutions, and solvent polarity on the water absorption have been also studied. Under the experimental conditions, the copolymer poly(NNDMAAm-co-AMPS) with a feed mol ratio 1:2 presents the best swelling properties. The monomer reactivity ratios for poly(NNDMAAm-co-AMPS) are the following: r1 = 0.217 and r2 = 2.20, (r1 x r2 = 0.48).
author	POOLEY,S. AMALIA RIVAS,BERNABÉ L CÁRCAMO,AMITZA L PIZARRO,GUADALUPE DEL C
author_facet	POOLEY,S. AMALIA RIVAS,BERNABÉ L CÁRCAMO,AMITZA L PIZARRO,GUADALUPE DEL C
author_sort	POOLEY,S. AMALIA
title	HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES
title_short	HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES
title_full	HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES
title_fullStr	HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES
title_full_unstemmed	HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES
title_sort	hydrogels from n,n'-dimethylacrylamide-co-2-acrylamido-2-methyl-1-propanesulfonic acid with salt-, temperature- and ph-responsiveness properties
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200008
work_keys_str_mv	AT pooleysamalia hydrogelsfromnndimethylacrylamideco2acrylamido2methyl1propanesulfonicacidwithsalttemperatureandphresponsivenessproperties AT rivasbernabel hydrogelsfromnndimethylacrylamideco2acrylamido2methyl1propanesulfonicacidwithsalttemperatureandphresponsivenessproperties AT carcamoamitzal hydrogelsfromnndimethylacrylamideco2acrylamido2methyl1propanesulfonicacidwithsalttemperatureandphresponsivenessproperties AT pizarroguadalupedelc hydrogelsfromnndimethylacrylamideco2acrylamido2methyl1propanesulfonicacidwithsalttemperatureandphresponsivenessproperties
_version_	1718445386490707968

HYDROGELS FROM N,N'-DIMETHYLACRYLAMIDE-co-2-ACRYLAMIDO-2-METHYL-1-PROPANESULFONIC ACID WITH SALT-, TEMPERATURE- AND pH-RESPONSIVENESS PROPERTIES

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