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Title: The influence of preparation method of OC1OC6-PPV films on the photo-oxidation process.
Authors: Olivati, Clarissa de Almeida
Ferreira, Marystela
Bianchi, Rodrigo Fernando
Faria, Roberto Mendonça
Oliveira Junior, Osvaldo Novais de
Balogh, Débora Terezia
Keywords: Derivative
Langmuire blodgett films
Cast films
Issue Date: 2006
Citation: OLIVATI, C. de A. The influence of preparation method of OC1OC6-PPV films on the photo-oxidation process. Polymer Degradation and Stability, v. 91, p. 2342-2346, 2006. Disponível em: <>. Acesso em: 23 fev. 2015.
Abstract: Poly( p-phenylene vinylene) (PPV) derivatives are well known for their applications in polymer light emitting diodes (PLEDs). PPV derivatives are highly susceptible to photo-oxidation though, which is mainly caused by the scission of the vinyl double bond on the polymer backbone. In this work, we show that LangmuireBlodgett (LB) films are less degraded than cast films of a PPV derivative (OC1OC6-PPV). Both films had similar thickness (w50 nm) to allow for a more realistic comparison. Degradation was monitored with UVevis and FTIR spectroscopies. The results indicated that cast films were completely degraded in ca. 400 min, while LB took longer time, i.e. about four times the values for the cast films. The differences can be attributed to the more compact morphology in the LB than in the cast films. With a compact morphology the diffusion of oxygen in the LB film is hampered and this causes a delay in the degradation process.
ISSN: 0141-3910
metadata.dc.rights.license: O periódico Polymer Degradation and Stability concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3565381133097.
Appears in Collections:DEFIS - Artigos publicados em periódicos

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