THERMAL DEGRADATION OF FIBER-REINFORCED BIO-BASED RIGID POLYURETHANE FOAMS

摘要

Rigid polyurethane (PU) foams were prepared by a multi-step procedure using a polyol blend of poly(ethylenglycol) PEG-200/pineapple molasses, and 4,4'-diisophenylmethane diisocyanate (MDI), with a NCO/OH ratio of 1.2. Such material was reinforced with fibers from banana rachis, with a fiber composition ranging from 18% to 40%wt. Thermal, and themooxidative degradation properties of these composites were assessed. Thermal degradation of PU60 showed the highest polymer lifetime values.