Efficient green synthesis of bis(cyclic carbonate) poly(dimethylsiloxane) derivative using CO2 addition: a novel precursor for synthesis of urethanes

Autor(es)

Aguiar, K. R. ^[1] ; Santos, V. G. ^[2] ; Eberlin, M. N. ^[2] ; Rischka, K. ^[3] ; Noeske, M. ^[3] ; Tremiliosi-Filho, G. ^[1] ; Rodrigues-Filho, U. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, Sao Carlos, SP - Brazil

^[2] Univ Estadual Campinas, ThoMSon Mass Spectrometry Lab, Campinas, SP - Brazil

^[3] Fraunhofer Inst Fertigungstech & Angew Mat Forsch, Bremen - Germany

• Tipo de documento: Artigo Científico
• Fonte: RSC ADVANCES; v. 4, n. 46, p. 24334-24343, 2014.
• Citações Web of Science: 20

Resumo

Poly(dimethyl siloxane), PDMS, with terminal cyclic carbonate groups was prepared by cycloaddition of carbon dioxide to epoxy rings using tetra alkyl-ammonium bromide as a catalyst under efficient and mild conditions. The process was carried out under a modest pressure of carbon dioxide (i.e., <2 MPa) and temperature (<200 degrees C). The oligomeric species was found to be a non-Newtonian fluid with low molecular weight (MW similar to 1200 g mol(-1)) with n = xx - yy and thermally stable up to 200 degrees C. Its formation was verified by mid infrared spectroscopy (FT-MIR), Matrix-Assisted Laser Desorption Ionization Mass Spectroscopy MALDI-Tof-MS and multinuclear magnetic resonance (C-13 NMR, Si-29 NMR, H-1 NMR). The urethane synthesis was confirmed by FTIR, NMR and X-ray Photoelectron Spectroscopy (XPS) after reacting amines or diamines, in mild reactions conditions, with bis(cyclic carbonate) poly(dimethylsiloxane). (AU)

• Processo FAPESP: 13/05279-3 - Adesivos biomiméticos baseados em uretanas derivadas de poli(dimetilsiloxano) utilizando fixação de CO2
• Beneficiário: Kelen Menezes Flores Rossi de Aguiar
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/08120-0 - Filmes nanoestruturados: impacto da arquitetura dos filmes contendo nanopartículas e fosfotungstato sobre as propriedades fotoativas
• Beneficiário: Ubirajara Pereira Rodrigues Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/06019-0 - Fixação de CO2 e síntese de co-polímeros de poliuretana e polisilicona incorporado em ormosils: utilização como filmes bioativos e sistemas condutores iônicos
• Beneficiário: Kelen Menezes Flores Rossi de Aguiar
• Modalidade de apoio: Bolsas no Brasil - Doutorado