resumo
This investigation describes preliminary results related to the preparation of monomers based on vegetable oil derivatives bearing furan heterocycles appended through thiol-ene click chemistry, and their subsequent polymerization via the Diels-Alder (DA) polycondensation between furan and maleimide complementary moieties, i.e. a second type of click chemistry. Following the optimization of these interactions with model compounds, two basic approaches were considered for these DA polymerizations, namely (i) the use of monomers with two terminal furan rings in conjunction with bismaleimides (AA+BB systems) and (ii) the use of AB monomers incorporating both furan and maleimide end-groups. This ongoing study clearly showed that both approaches were successful, albeit with different outcomes, in terms of the nature of the products. The application of the retro-DA reaction confirmed their thermoreversible character, i.e. the clean-cut return to their respective starting monomers.
palavras-chave
DIELS-ALDER REACTION; VEGETABLE-OILS; POLYMERS; CHEMISTRY; SERVICE
categoria
Polymer Science
autores
Vilela, C; Cruciani, L; Silvestre, AJD; Gandini, A
nossos autores
Alessandro Gandini
Investigador
Armando Jorge Domingues Silvestre
Professor Catedrático
Carla Vilela
Professor Auxiliaragradecimentos
AG wishes to thank Professor Mats Johansson of KTH, Stockholm, for a helpful discussion on the basic idea of this study. We thank the Portuguese Foundation for Science and Technology (FCT) for analytical instrumentation support (POCI 2010 and REEQ/515/CTM/2005) and for a doctorate grant to CV (SFRH/BD/44884/2008). LC thanks the Department of Civil Environmental and Materials Engineering - DICAM of the University of Bologna. We are also grateful to Professor D. Evtuguin for carrying out the SEC experiments.