A. Paberza*, L. Stiebra, U. Cabulis
Journal of Renewable Materials, Vol.3, No.1, pp. 19-27, 2015, DOI:10.7569/JRM.2014.634138
Abstract Rigid polyurethane foams were obtained from pulp production byproducts. Three different polyols
were used—tall oil polyol, lignopolyol and commercially available polyol for comparison. The obtained
rigid polyurethane foams underwent photodegradation at 60°C temperature and at 0.89 W/m2 intensity
of UV light radiation up to 1000 h. Changes in chemical structure were observed by Fourier Transform
Infrared Spectroscopy and Scanning Electron Microscopy was used to study changes in cell morphology.
Spectrophotometery was used to determine yellowing of the foams. Results showed that the thickness of
degraded layer for rigid polyurethane foams obtained from pulp production byproducts was ~25% less than
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