Estudo de copolímeros conjugados em líquido iônico

• Ano de defesa: 2018
• Autor(a) principal: Pesco, Beatriz [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo
• Palavras-chave em Português: Conjugated polymers; Block polymers; PPV; PEG; Ionic liquid; Polímeros conjugados; Polímeros em blocos; Líquido iônico
• Link de acesso: https://sucupira.capes.gov.br/sucupira/public/consultas/coleta/trabalhoConclusao/viewTrabalhoConclusao.jsf?popup=true&id_trabalho=6344377; https://repositorio.unifesp.br/handle/11600/52784

Conjugated polymers are widely studied materials due to their diversity in applications. However, its rigidity gives the material low solubility. One strategy to solve this problem is to insert flexible groups into the insoluble conjugate material. In this context, the present work presents the synthesis of a block polymer, which is composed of intercalated conjugated and non-conjugated segment, derived from poly(p-phenylene vinylene) (PPV) and poly (ethylene oxide) (PEG). The material was synthesized and characterized by infrared, UV-Vis and fluorescence and the results showed a better solubility of the block polymer in organic solvent forms without loss or alteration of its adsorption and emission good. This material was incorporated into the ionic liquid (LI) butyltrimethyl ammonium bitrifloromethanesulfonylideide in proportions of 1: 1 and 3: 1 (polymer mass ratio / LI). The results obtained with X-ray diffraction show that the block material was crystalline and when the insertion of the ionic liquid it was observed in decrease of this crystallinity. It was also observed difference in absorption, emission, DSC and TGA files, showing that there is an interaction between the block polymer material and the ionic liquid, which promoted improvement in the emission intensity and greater thermal stability.