Lignins as macromonomers for polyesters and polyurethanes
Conference
·
OSTI ID:370048
- EFPG Martin d`Heres (France)
Lignins of different vegetal origin and from different delignification processes bear the common essential feature of containing both phenolic and aliphatic hydroxy groups, albeit in different total amounts and relative proportions. The present study reports the use of several lignins as polyfunctional oligomers for the direct elaboration of polyesters and polyurethanes, through their condensation reactions with acid chlorides and isocyanates, respectively. In the syntheses of polyesters the reagents were aliphatic and aromatic dichlotides and oligoethylene oxide glycols of different DP`s were added as chain extenders. The conditions were optimized and the ensuing networks thoroughly characterized. Two types of polyurethanes were prepared, namely thermoplastic structures arising from the reaction of lignins with oligoethylene oxide monoisocyanates and crosslinked products obtained from similar polycondensations, but with oligoethylene oxide diisocyanates. The properties of all these materials were examined in relation to their structural peculiarities and assessed in the light of possible applications.
- OSTI ID:
- 370048
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of Lignin-Based Polyurethane Thermoplastics
From Petroleum to Biobased Crude: A Thermoplastic Polyurethane from Lignin-Oil Without Isocyanates
Polyurethane synthesis reactions in asphalts
Journal Article
·
Mon Dec 31 23:00:00 EST 2012
· RSC Advances
·
OSTI ID:1097471
From Petroleum to Biobased Crude: A Thermoplastic Polyurethane from Lignin-Oil Without Isocyanates
Conference
·
Thu Jun 16 00:00:00 EDT 2022
·
OSTI ID:1957998
Polyurethane synthesis reactions in asphalts
Journal Article
·
Wed Mar 31 23:00:00 EST 1982
· J. Appl. Polym. Sci.; (United States)
·
OSTI ID:6820910