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

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

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Abstract

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 °C. ROMP of norbornene (NBE) occurred better at 50 °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 °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 Tg values varied from 37 °C in polyNBE to 90 °C in poly[NBE-co-NBD] as the NBD loading increased.

Original languageEnglish (US)
Pages (from-to)9424-9431
Number of pages8
JournalNew Journal of Chemistry
Volume40
Issue number11
DOIs
StatePublished - 2016

Bibliographical note

Funding Information:
The authors are grateful to FAPESP (process number: 2011/12571-7), CAPES and CNPq for financial support; Dr Debora T. Balogh for the DMA analyses performed at the Instituto de Fasica de Sao Carlos from Universidade de Sao Paulo; Prof. Dr Tiago Ven?ncio for the 500 MHz-NMR analyses performed at the Departamento de Qumica from Universidade Federal de Sao Carlos and Dr Gustavo Metzker and Thiago A. Silva for the EPR measurements at the Instituto de Qumica de Sao Carlos from Universidade de Sa o Paulo.

Publisher Copyright:
This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

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