In this paper, unmodified kraft softwood lignin was utilized to fully replace the petroleum-based polyol for the first time in low-density rigid polyurethane/polyisocyanurate (PUR/PIR) foam. The effects of different lignin incorporation levels (0, 25, 50, 75, and 100%) on foam properties were investigated by measuring foam’s reactivity, polyol viscosity (using a rheometer), apparent density, compression strength, closed cell content (using a gas pycnometer), thermal conductivity, fire resistance, and morphology (observed through SEM). All formulated lignin-based foams met the ASTM minimum requirements for type 1 rigid insulation foams. Remarkably, the foam made by replacing 100% of the petrochemical polyol with the commercially available kraft lignin demonstrated outstanding fire resistance performance, reducing the burn length by 127%.
@article{osti_2004973,
author = {Henry, Christián and Nejad, Mojgan},
title = {Lignin-Based Low-Density Rigid Polyurethane/Polyisocyanurate Foams},
annote = {In this paper, unmodified kraft softwood lignin was utilized to fully replace the petroleum-based polyol for the first time in low-density rigid polyurethane/polyisocyanurate (PUR/PIR) foam. The effects of different lignin incorporation levels (0, 25, 50, 75, and 100%) on foam properties were investigated by measuring foam’s reactivity, polyol viscosity (using a rheometer), apparent density, compression strength, closed cell content (using a gas pycnometer), thermal conductivity, fire resistance, and morphology (observed through SEM). All formulated lignin-based foams met the ASTM minimum requirements for type 1 rigid insulation foams. Remarkably, the foam made by replacing 100% of the petrochemical polyol with the commercially available kraft lignin demonstrated outstanding fire resistance performance, reducing the burn length by 127%.},
doi = {10.1021/acs.iecr.2c03728},
url = {https://www.osti.gov/biblio/2004973},
journal = {Industrial and Engineering Chemistry Research},
issn = {ISSN 0888-5885},
number = {18},
volume = {62},
place = {United States},
publisher = {American Chemical Society (ACS)},
year = {2023},
month = {05}}
PROCEEDINGS OF PPS-29: The 29th International Conference of the Polymer Processing Society - Conference Papers, AIP Conference Proceedingshttps://doi.org/10.1063/1.4873806
