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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Photodegradation of poly(ethyleneoxide)/montmorillonite composite films

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Autor(es):
Lombardo, Patricia C. [1] ; Poli, Alessandra L. [1] ; Neumann, Miguel G. [1] ; Machado, Douglas S. [1] ; Schmitt, Carla C. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Journal of Applied Polymer Science; v. 127, n. 5, p. 3687-3692, MAR 5 2013.
Citações Web of Science: 9
Resumo

Poly(ethyleneoxide) (PEO) composites with SWy-1 montmorillonite were prepared by mixing the polymer and the clay in aqueous colloidal solutions. Thin films of the composites were obtained by solvent evaporation and exposed to 254-nm UV-irradiation. The photodegradation was monitored by FTIR and the chain scission reaction was confirmed by measurement of average molecular weights using size exclusion chromatography. The rate of oxidation of pure PEO was much faster than that of the composites (SWy-1/PEO). The SWy-1 clay stabilizes the polymer against UV irradiation. This stabilization is due to two factors: on one side, the absorption of UV radiation by the clay, and on the other the scattering of the incident radiation by the particles; both contributing to minimize the degradation rate of the PEO present in the composites. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 (AU)

Processo FAPESP: 09/15998-1 - Interações de luz UV/visível com compósitos de polímero-argila: fotopolimerização e fotodegradação
Beneficiário:Carla Cristina Schmitt Cavalheiro
Linha de fomento: Auxílio à Pesquisa - Regular