Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/1430
Título: Rigid polyurethane foams from lignin based polyols
Autor: Cateto, C.A.
Barreiro, M.F.
Rodrigues, A.E.
Belgacem, M.N.
Palavras-chave: Lignin
Biopolyols
Polyurehane foams
Data: 2008
Editora: AIP - American Institute of Physics
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
Relatório da Série N.º: 1042;
Resumo: 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.
URI: http://hdl.handle.net/10198/1430
ISBN: 978-0-7354-0570-7
ISSN: 0094-243X
Aparece nas colecções:CIMO - Publicações em Proceedings Indexadas à WoS/Scopus

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