• Leszczyński, Michał Krzysztof
• Michałowski, Sławomir
• Ryszkowska, Joanna
• Czajka, Anna
• Gloc, Michał
• Prociak, Aleksander
• Leszczyńska, Milena
• Uram, Katarzyna

Abstract

<jats:p>Rigid polyurethane foams were obtained using two types of renewable raw materials: bio-polyols and a cellulose filler (ARBOCEL® P 4000 X, JRS Rettenmaier, Rosenberg, Germany). A polyurethane system containing 40 wt.% of rapeseed oil-based polyols was modified with the cellulose filler in amounts of 1, 2, and 3 php (per hundred polyols). The cellulose was incorporated into the polyol premix as filler dispersion in a petrochemical polyol made using calenders. The cellulose filler was examined in terms of the degree of crystallinity using the powder X-ray diffraction PXRD -and the presence of bonds by means of the fourier transform infrared spectroscopy FT-IR. It was found that the addition of the cellulose filler increased the number of cells in the foams in both cross-sections—parallel and perpendicular to the direction of the foam growth—while reducing the sizes of those cells. Additionally, the foams had closed cell contents of more than 90% and initial thermal conductivity coefficients of 24.8 mW/m∙K. The insulation materials were dimensionally stable, especially at temperatures close to 0 °C, which qualifies them for use as insulation at low temperatures.</jats:p>

Topics

• dispersion
• composite
• powder X-ray diffraction
• cellulose
• Fourier transform infrared spectroscopy
• thermal conductivity
• crystallinity