Thermally crosslinkable poly(N-isopropylacrylamide) copolymers: Synthesis and characterization of temperature-responsive hydrogel

Chuang, Wen-Ju; Chiu, Wen‐Yen; Tai, H.

doi:10.1016/j.matchemphys.2012.04.030

Cited by 15 publications

(13 citation statements)

References 18 publications

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“…This result is in agreement with other literatures, reported elsewhere (21,24). The result implies that the structure of copolymer hydrogels would become denser and more tightened as the crosslinking agent was increased.…”

Section: Effect Of Crosslink Densitysupporting

confidence: 93%

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pH and Thermo Sensitive Superabsorbent Poly (N-Hydroxymethylacrylamide-co-Itaconic Acid) Hydrogels: Synthesis, Characterization and Kinetic Studies

Özdemir

Mazi²

2014

Journal of Macromolecular Science, Part A

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In this study, itaconic acid (IA) was co-polymerized with N-hydroxymethylacrylamide (NHMAA) by free radical solution polymerization to prepare pH and thermo sensitive superabsorbent hydrogels. The polymerization process was carried out at 25 C by using ammonium persulfate (APS) and N,N,N',N'-tetramethylethylenediamine (TMEDA) as initiating system and ethyleneglycoldimethacrylate (EGDMA) as a crosslinking agent. The effects of copolymer composition, crosslinking agent concentration, pH and temperature on swelling capacity and kinetic parameters were investigated. The copolymer hydrogels were characterized by using swelling studies and FT-IR analyses. The equilibrium degree of swelling of hydrogels was found to increase as pH value of the swelling solution varied from 2 to 12 and temperature from 45 to 25 C. The dynamic swelling studies have showed that, the diffusion exponent(n) and the diffusion coefficient(k) both increase with increasing content of itaconic acid.

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Section: Effect Of Crosslink Densitysupporting

confidence: 93%

“…N-(hydroxymethyl acrylamide) (NHMAA) is a bifunctional monomer containing a self-condensable methylol group and a reactive double bond (21).…”

Section: Introductionmentioning

confidence: 99%

pH and Thermo Sensitive Superabsorbent Poly (N-Hydroxymethylacrylamide-co-Itaconic Acid) Hydrogels: Synthesis, Characterization and Kinetic Studies

Özdemir

Mazi²

2014

Journal of Macromolecular Science, Part A

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“…For fabricating the stable TCC hydrogel, thermocrosslinkable copolymer PNN was synthesized . The crosslinking mechanism was illustrated in Scheme .…”

Section: Results and Disscussionmentioning

confidence: 99%

“…Both of them generate new chemical bonds among polymer chains by postcuring process. Some polymers with functional groups such as hydroxyl, carboxylic acid groups and so on, can react by condensation reaction after thermocuring . On the other hand, polymers with CC double‐bonds, such as polybutadiene, can polymerize by UV curing .…”

Section: Introductionmentioning

confidence: 99%

Thermoresponsive conductive polymer composite thin film and fiber mat: Crosslinked PEDOT:PSS and P(NIPAAm-co-NMA) composite

Huang

Lin

Don

et al. 2015

J. Polym. Sci. Part A: Polym. Chem.

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ABSTRACT:The thermoresponsive conductive composite (TCC) thin films and fiber mats, whose electrical property changed with temperature, were fabricated successfully. The thermocrosslinkable and thermoresponsive copolymer, poly (N-isopropyl acrylamide-co-N-methylolacrylamide) (PNN), was synthesized. The TCC thin film and fiber mat were fabricated by spin coating and electrospinning process of PEDOT:PSS/ PNN solutions, respectively. After thermocrosslinking and doping by DMSO, the composite thin films and fiber mats were obtained. Fibrous structures of TCC fiber mats were observed by SEM. The surface resistance and conductivity of composites were measured. The thermoresponsivity and swelling ratio of TCCs were also studied. The thermoresponsive conductive property was analyzed by measuring the surface resistance of TCCs in water bath under various temperatures from 20 to 50 8C. With the increase of temperature, the TCCs shrank to be dense structure and showed lower surface resistance. The TCC fibers mat exhibited greater sensitivity to temperature than thin film owing to its fibrous structure.

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“…Such bright is the future of PNIPAAm that represents one of the most widely investigated stimulus-responsive materials for biomedical applications [5,6]. PNIPAAm structure is composed of a hydrophilic amide (-CONH-) and a hydrophobic isopropyl group (-CH(CH 3 ) 2 ) in its chain [7], which results in a lower critical solution temperature (LCST) or cloud point at 32°C because of hydrogen bonding interactions between the amide group and water molecules. For this reason, up to now this polymer has been widely used in order to develop hydrogels [8].…”

Section: Introductionmentioning

confidence: 99%

Study of the chain microstructure effects on the resulting thermal properties of poly(l-lactide)/poly(N-isopropylacrylamide) biomedical materials

Lizundia

Meaurio

Laza

et al. 2015

Materials Science and Engineering: C

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Thermally crosslinkable poly(N-isopropylacrylamide) copolymers: Synthesis and characterization of temperature-responsive hydrogel

Cited by 15 publications

References 18 publications

pH and Thermo Sensitive Superabsorbent Poly (N-Hydroxymethylacrylamide-co-Itaconic Acid) Hydrogels: Synthesis, Characterization and Kinetic Studies

pH and Thermo Sensitive Superabsorbent Poly (N-Hydroxymethylacrylamide-co-Itaconic Acid) Hydrogels: Synthesis, Characterization and Kinetic Studies

Thermoresponsive conductive polymer composite thin film and fiber mat: Crosslinked PEDOT:PSS and P(NIPAAm-co-NMA) composite

Study of the chain microstructure effects on the resulting thermal properties of poly(l-lactide)/poly(N-isopropylacrylamide) biomedical materials

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