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Synthesis and characterization of poly(N-isopropylmethacrylamide-co-N-isopropylacrylamide) copolymers

Urosevic, Maja Z ; Nikolic, Ljubisa B ; Ilic-Stojanovic, Snezana ; Zdravkovic, Aleksandar ; Nikolic, Vesna D

Hemijska industrija, 2020-01, Vol.74 (2), p.103-117 [Periódico revisado por pares]

Belgrade: Association of Chemical Engineers of Serbia

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  • Título:
    Synthesis and characterization of poly(N-isopropylmethacrylamide-co-N-isopropylacrylamide) copolymers
  • Autor: Urosevic, Maja Z ; Nikolic, Ljubisa B ; Ilic-Stojanovic, Snezana ; Zdravkovic, Aleksandar ; Nikolic, Vesna D
  • Assuntos: Active control ; Chemical synthesis ; Controlled release ; Copolymers ; Crosslinking ; fourier transform infrared spectroscopy ftir ; Fourier transforms ; Glycol dimethacrylates ; High performance liquid chromatography ; high-pressure liquid chromatography hplc ; hydrogel ; Hydrogels ; Infrared spectroscopy ; Isopropylacrylamide ; Methylene blue ; Monomers ; Polymerization ; Swelling
  • É parte de: Hemijska industrija, 2020-01, Vol.74 (2), p.103-117
  • Descrição: Copolymeric hydrogels of poly(N-isopropylmethacrylamide-co-N-isopropylacrylamide), p(NIPMAM/NIPAM), are synthesized by radical polymerization of N-isopropylmethacryl-amide (NIPMAM) and N-isopropylacrylamide (NIPAM) monomers by using the cross-linker ethylen glycol dimethacrylate (EGDM). The synthesized copolymeric p(NIPMAM/NIPAM) hydrogels, starting monomers and the cross-linker were structurally characterized by using Fourier transform infrared spectroscopy (FTIR). The amounts of residual reactants in the synthesized hydrogels were determined by high-pressure liquid chromatography (HPLC). Swelling of p(NIPMAM/NIPAM) hydrogels was investigated in relation to the temperature and pH value of the solution. The obtained values of residual monomer quantities are within acceptable limits and in the range from 2.69 to 5.25 mg g-1 for NIPMAM and 14.55 to 30.80 mg g-1 for NIPAM. The synthesized p(NIPMAM/NIPAM) hydrogels are negatively thermosensitive. The most common mechanisms of transport of a swelling solution in p(NIPMAM/NIPAM) hydrogels are polymer chain relaxation, (Case III), and the anomalous type of diffusion (non-Fickian diffusion). The maximal equilibrium swelling degree of 51.19 was reached by the p(NIPMAM/NIPAM) hydrogel with 1.5 mol% of EGDM at the temperature of 25?C and pH 4, whereas the lowest one of 0.98 was exhibited by the hydrogel with 3 mol% of EGDM at the temperature of 80?C and pH 7. Due to their low content of residual reactants and a satisfactory degree of swelling at various pH values, synthesized p(NIPMAM/NIPAM) hydrogels can be applied as carriers for the controlled release of pharmaceutically active substances. nema
  • Editor: Belgrade: Association of Chemical Engineers of Serbia
  • Idioma: Inglês;Serbian
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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