| Full text | |
| Author(s): |
Capitao, R. M.
;
Santo, R. D. E.
;
Magalhaes, A.
;
Assis, D.
;
da Silva, G. V. J.
;
Scarim, C. B.
;
Chelucci, R. C.
;
Andrade, C. R.
;
Chung, M. C.
;
Gonzalez, E. R. P.
Total Authors: 10
|
| Document type: | Journal article |
| Source: | RSC ADVANCES; v. 6, n. 83, p. 79987-79997, 2016. |
| Web of Science Citations: | 0 |
| Abstract | |
The present work describes the synthesis of azo carbonate monomers by a clean carbonylation synthetic route using di-methylcarbonate. The kinetics study showed a conversion of similar to 98% to bis-carbonates after only six minutes of reaction using triazabicyclo{[}4.4.0]dec-5-ene (TBD) as the catalyst. The preparation of azo-carbonates by means of coupling aryldiazonium salts with bis-carbonate was performed. The reactivity of azo-carbonate monomers was tested in the polycondensation reaction with an aminoalcohol using TBD as a catalyst for the formation of non-isocyanate poly(azo-carbonate-urethane)s PCU 1 and PCU 2. The copolymers' structures were confirmed by FT-IR, NMR and MALDI experiments, which allow us to determine the different terminal groups of the polymer chains formed. The molecular weights and the molecular weight distribution of PCU 1 and PCU 2 were determined by size-exclusion chromatography (SEC) experiments and thermal stabilities were also studied by TG analysis. The biocompatible properties of monomers 4 and 6 and polymers PCU 1 and PCU 2 were investigated by liver, kidney and colon histological analyses. (AU) | |
| FAPESP's process: | 13/24487-6 - Study of reactions of clean synthesis and chemical modification of the biodiesel and fusel oil for preparation of organic carbonate and carbamates using carbon dioxide in the presence of organocatalysts and heterogeneous catalysts |
| Grantee: | Eduardo Rene Perez Gonzalez |
| Support Opportunities: | Regular Research Grants |