Rigid polyurethane foams from lignin based polyols

Cateto, Carolina; Barreiro, M.F.; Rodrigues, Alírio; Belgacem, Mohamed Naceur

http://hdl.handle.net/10198/1430

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Authors

Cateto, Carolina

Barreiro, M.F.

Rodrigues, Alírio

Belgacem, Mohamed Naceur

Abstract(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.

Keywords

Lignin Biopolyols Polyurehane foams

URI

http://hdl.handle.net/10198/1430

Citation

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