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Título: | Dynamic formation of SEBS copolymer submicrometric structures. |
Autor(es): | Salvador, Michele Aparecida Bianchi, Andrea Gomes Campos Silva, Marcelo de Assumpção Pereira da Carvalho, Antônio José Felix de Faria, Roberto Mendonça |
Palavras-chave: | Thin films Phase separation Block copolymer |
Data do documento: | 2010 |
Referência: | SALVADOR, M. A. et al. Dynamic formation of SEBS copolymer submicrometric structures. Polymer, v. 51, n. 18, p. 4145-4151, ago. 2010. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0032386110005756>. Acesso em: 10 jul. 2012. |
Resumo: | Highly ordered AeBeA block copolymer arrangements in the submicrometric scale, resulting from dewetting and solvent evaporation of thin films, have inspired a variety of new applications in the nanometric world. Despite the progress observed in the control of such structures, the intricate scientific phenomena related to regular patterns formation are still not completely elucidated. SEBS is a standard example of a triblock copolymer that forms spontaneously impressive pattern arrangements. From macroscopic thin liquid films of SEBS solution, several physical effects and phenomena act synergisticallyto achieve well-arranged patterns of stripes and/or droplets. That is, concomitant with dewetting, solvent evaporation, and Marangoni effect, Rayleigh instability and phase separation also play important role in the pattern formation. These two last effects are difficult to be followed experimentally in the nanoscale, which render difficulties to the comprehension of the whole phenomenon. In this paper, we use computational methods for image analysis, which provide quantitative morphometric data of the patterns, specifically comprising stripes fragmentation into droplets. With the help of these computational techniques, we developed an explanation for the final part of the pattern formation, i.e. structural dynamics related to the stripes fragmentation. |
URI: | http://www.repositorio.ufop.br/handle/123456789/1046 |
ISSN: | 00323861 |
Licença: | O periódico Polymer concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3460340544845. |
Aparece nas coleções: | DEFIS - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_DynamicFormationCopolymer.pdf | 1,23 MB | Adobe PDF | Visualizar/Abrir |
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