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

Author(s)

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]

Affiliation

^[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

• Document type: Journal article
• Source: RSC ADVANCES; v. 4, n. 46, p. 24334-24343, 2014.
• Web of Science Citations: 20

Abstract

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)

• FAPESP's process: 13/05279-3 - Poly(dimethylsiloxane) based segmented urethanes biomimetic adhesives Based on CO2 fixation
• Grantee: Kelen Menezes Flores Rossi de Aguiar
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 11/08120-0 - Nanostructured films: on the influence of the architecture on Photoactivity properties of films with phosphotungstate and nanoparticles
• Grantee: Ubirajara Pereira Rodrigues Filho
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/06019-0 - CO2 uptake and synthesis of polyuretanes-polysilicone co-polymers as additives incorporated in ormosils: use on bioactive and ion conducting films
• Grantee: Kelen Menezes Flores Rossi de Aguiar
• Support Opportunities: Scholarships in Brazil - Doctorate