Copolymers from norbornene and norbornadiene with organized morphologies and high T-g values obtained via ROMP with a highly reactive [RuCl3(PCy3)(2)] complex

Autor(es)

Ferraz, C. P. ; Fonseca, L. R. ; Tomazetti, V. ; Silva, F. C. S. ; Lima-Neto, B. S. ; Carvalho, Jr., V. P.

• Tipo de documento: Artigo Científico
• Fonte: NEW JOURNAL OF CHEMISTRY; v. 40, n. 11, p. 9424-9431, 2016.
• Citações Web of Science: 4

Resumo

The {[}RuCl3(PCy3)(2)] complex presented high reactivity toward ring opening metathesis polymerization (ROMP) of norbornadiene (NBD) in a non-degassed solution upon addition of ethyl diazoacetate (EDA). Quantitative yields of polyNBD were obtained instantaneously at 25 degrees C. ROMP of norbornene (NBE) occurred better at 50 degrees C for 60 min, with 95% of isolated polyNBE. Copolymers with different porous structures were obtained from ROMP of NBE in the presence of NBD with different starting {[}NBE]/{[}NBD] molar ratios at 25 degrees C. SEM micrographs showed a more organized porous structure as the NBD loading decreased. A well-defined honeycomb-like pattern was recorded for the copolymer from the run with an NBE: NBD molar ratio load of 5000: 500. The T-g values varied from 37 degrees C in polyNBE to 90 degrees C in poly{[}NBE-co-NBD] as the NBD loading increased. (AU)

• Processo FAPESP: 11/12571-7 - Desenvolvimento de complexos do tipo [RuCl2(PPh3)2(amina)] para aplicação em reações de polimerização via metátese de olefinas cíclicas
• Beneficiário: Larissa Ribeiro da Fonseca
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto