Síntese e Polimerização da 2-Fenil-2-oxazolina assistidas por Micro-ondas

• Autor(a) principal: Silva, Raphael Henrique Sanches de Carvalho e
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15665
• topic: 2-oxazoline; Polymerization; Synthesis assisted by microwave; Poli(2-oxazoline); 2-oxazolina; Polimerização; Síntese assistida por micro-ondas; Poli(2-oxazolina); CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA

Currently, microwave irradiation has been recommended as a good source of energy for the realization of organic synthesis, due to a number of advantages that this new technology presents. However, there are few studies on polymerization assisted by microwave. In this work were the synthesis of 2-phenyl-2-oxazoline and their polymerization in solution and in mass, assisted by microwave and conventional method (thermal). The reactions by microwave irradiation were made employing an open or closed vessel, and polymerization initiators were used as the methyl iodide and the ethereal boron trifluoride. The heterocyclic polymers were characterized by infrared spectroscopy and nuclear magnetic resonance of the hydrogen nucleus. For the reactions assisted microwave yields were good and consistent with those obtained by conventional method. For the reaction of synthesis of 2-phenyl-2-oxazoline income was in the range of 70% and its polymerization was around 80%, and the reactions by microwave irradiation performed in a reaction time much lower than the thermal method . The technique of microwave irradiation for the reactions studied was efficient for the parameters used in the synthesis of the monomer and its polymerization in bulk.