M. Kurańska, A. Prociak, U. Cabulis, M. Kirpluks
Water-blown polyurethane-polyisocyanurate foams based on bio-polyols with wood fibers (in English)
Polimery 2015, No 11-12, 705
In this paper rigid polyurethane-polyisocyanurate (PUR-PIR) foam andwood fiber composites were synthesized using two types of bio-polyols. The PUR-PIR systemswere modified with 3 and 6wt% of wood fibers. The influence of the content of wood fibers on the cellular structure was examined with scanning electron microscopy (SEM). Thermal and mechanical properties of the compositeswere characterized with thermogravimetric analysis, thermal conductivity, compressive strength, and Young modulus measurements. The influence ofwood fibers on flammability of PUR-PIR foamswas analyzed by oxygen index and cone calorimeter tests. For the most of foams, introduction ofwood fibers did not affect the change in compressive strength. Introduction ofwood fibers increased the temperature at which thermal degradation began, as well as the temperature at which occurs 5, 25 and 50 % weight loss. The studies have shown that the oxygen index of the obtained PUR-PIR foams insignificantly decreases with increasing wood fibers content.
: rigid polyurethane-polyisocyanurate foams, bio-polyol, wood fibers, mechanical properties, thermal properties, flammability
- M. Kurańska, A. Prociak, U. Cabulis, M. Kirpluks (274.7 KB)
- Water-blown polyurethane-polyisocyanurate foams based on bio-polyols with wood fibers