Synthesis and characterization of stimuli-responsive polypropylene containing N-vinylcaprolactam and N-vinylimidazole obtained by ionizing radiation
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Materials Science and Engineering C
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Resumo
Polypropylene films were grafted with thermo-responsive N-vinylcaprolactam and pH-responsive Nvinylimidazole
polymers by means of gamma radiation using pre-irradiation and direct methods, in order to
functionalize the films with thermo- and/or pH-responsiveness. The dependence of grafting yield on parameters
such as co-monomer concentration, pre-irradiation dose, temperature, and reaction time was evaluated. The
samples were characterized by Fourier transform infrared and X-ray photoelectron spectroscopies, differential
scanning calorimetry, thermogravimetric analysis, swelling studies in different solvents, and water contact
angle. The grafted copolymers presented thermo- and pH-sensitiveness, highlighting their potential as advanced
biomaterials, capable of providing adequate environment for hosting and sustained release of antimicrobial
drugs bearing cationic moieties, such as groups of diclofenac, while still exhibiting good cytocompatibility.
Como referenciar
ZAVALA-LAGUNES, EDGAR; RUIZ, JUAN-CARLOS; VARCA, GUSTAVO H.C.; BUCIO, EMILIO. Synthesis and characterization of stimuli-responsive polypropylene containing N-vinylcaprolactam and N-vinylimidazole obtained by ionizing radiation. Materials Science and Engineering C, v. 67, p. 353-361, 2016. DOI: 10.1016/j.msec.2016.05.044. Disponível em: http://repositorio.ipen.br/handle/123456789/26781. Acesso em: 27 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Assuntos
biological materials; calorimetry; concentration ratio; copolymers; drugs; films; fourier transformation; gamma radiation; grafts; imidazoles; irradiation; monomers; ph value; polypropylene; radiation doses; solvents; swelling; synthesis; thermal gravimetric analysis; x-ray photoelectron spectroscopy