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De-aggregation of polyfluorene derivative by blending with a series of poly(alkyl methacrylate)s with varying sidegroup sizes |
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| Authors: | José Roberto Tozoni Teresa Dib Zambon Atvars Leni Akcelrud Tito José Bonagamba |
| Institution: | a Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, São Carlos, 13560-970 São Paulo, Brazil b Instituto de Química, Universidade Estadual de Campinas, P.O. Box 6154, Campinas, 13084-971 São Paulo, Brazil c Laboratório de Polímeros Paulo Scarpa (LaPPS) UFPR, Universidade Federal do Paraná, P.O. Box 19081, Curitiba, 81531-990 Paraná, Brazil |
| Abstract: | A polyfluorene derivative of the PPV, poly(9,9′-n-dihexyl-2,7-fluorenedilvinylene-alt-1,4-phenylenevinylene), with a strong tendency to aggregation was blended with several members of a series composed by poly(alkyl methacrylate)s with the following substituents in the ester position: methyl, ethyl, isopropyl, isobutyl, n-butyl, and cyclohexyl. The de-aggregation effect in blends was studied by steady-state photoluminescence spectroscopy using several blend compositions. The efficiency of each dispersing phase was discussed in terms of the polymer miscibility, controlled by interaction parameters between the polyfluorene and every poly(alkyl methacrylate)s, here described using Hildebrand solubility parameters. |
| Keywords: | Polyfluorene Fluorescence Aggregates Polymer matrices Poly(alkyl methacrylate)s |
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