Produção de um compósito a partir de materiais sustentáveis

Abstract

The current work had as aim the production of a composite material from the expansive resin of castor beans oil and remains of useless tires for thermal isolation and sound absorption. Proof materials were produced on the compositions of 0%, 5%, 10%, 15% and 20% according to the amount of tire remains added to the mixture. Later on, the coefficient of sound absorption by the transfer function method as described on the international rule ISO 10534- 2:1998 and the thermal conductivity adoption the procedures from the technical rule ASTMC518 of them. The D-70 castor beans polyurethane is able to absorb 20% more the sound comparing to the D-40 castor beans polyurethane and also absorbs 3% more the sound comparing to oil polyurethane. The best acoustic performance was obtained by the composite sample of 20% of tire remains that has sound absorption coefficient higher than the D-70 CBP, the D-40 CBP and the oil polyurethane, of about 15%, 35% and 18% respectively. The composites produced showed less thermal conductivity than the oil polyurethane, the glass wool and the rock wool. It was concluded that the addition of the tire has increased the capability to absorb the sound from the composites and that the use of castor beans polyurethane of more density increases the sound absorption of the composite, as well as not influencing negatively its low thermal conductivity. Moreover, they show thermal conductivity considerably less than oil polyurethane, glass wool and rock wool.