A carregar...
Publicação
Rigid polyurethane foams from lignin based polyols
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 514.48 KB | Adobe PDF |
Orientador(es)
Resumo(s)
Rigid polyurethane (RPU) foams were synthesized using lignin-based polyols obtained by an oxypropylation process. Alcell, Indulin AT, Curan 27-11P and Sarkanda lignins have been oxypropylated using formulations deduced from an optimization study with Alcell. L/PO/C (ratio between lignin, PO and catalyst content) of 30/70/2 and 20/80/5 were used to obtain the desired polyols. The resulting RPU foams were characterized in terms of density, mechanical properties, conductivity and morphology. All Sarkanda lignin based polyols and the 30/70/2 Curan 27-11P polyol were found inadequate for RPU formulations. Alcell and Indulin AT based polyols and the 20/80/5 Curan 27-11P polyol resulted in RPU foams with properties very similar to those obtained from conventional commercial polyols. RPU foams produced with the 30/70/2 Alcell and the 30/70/2 Indulin AT polyols exhibited improved properties compared with those from 20/80/5 based formulations.
Descrição
Palavras-chave
Lignin Biopolyols Polyurehane foams
Contexto Educativo
Citação
Cateto, C.A.; Barreiro, M.F.; Rodrigues, A.E.; Belgacem, M.N. (2008). Rigid polyurethane foams from lignin based polyols. In IVth AIP Conferences Proceedings. ISSN 0094-243X. 1042:1. International Conference on times of polymers (TOP) and composites. Ischida, Italy. ISBN 978-0-7354-0570-7
Editora
AIP - American Institute of Physics