CHARACTERIZATION OF CASTOR OIL POLYURETHANE COMPOSITES WITH GLASS POWDER WASTE FOR APPLICATION IN THERMAL INSULATIONS /CARACTERIZAÇÃO DE COMPOSÍTOS DE POLIURETANO DE ÓLEO DE MAMONA COM PÓ DE VIDRO PARA APLICAÇÕES EM ISOLANTES TÉRMICOS

The production of PURM (rigid polyurethane foam from castor oil source) composites with glass powder (GP) waste is economical and renewable actions of fabrication of thermal insulating materials. Based on these aspects, the study aimed to characterize composites PURM with 5, 10, 20, 30, 40 and 50% of GP waste contents, by mass. It was observed the influence of the GP percentages in PURM matrix of the composites. The results of the characterizations of density, thermal conductivity, morphology by SEM and chemical microanalysis by EDS were introduced and discussed. In general, the structure of pure PURM showed the elongated, regular and large pores; while composites of PURM + GP presented the irregular, small and rounded pores with presence of deformed cells. By density analysis it was percept the proportional relationship between the thermal conductivity and the GP contents. However, thermal conductivities of the PURM-GP5 and PURM-GP10 composites indicated similarities with pure PURM. Therefore, the PURM composites can be used as thermal insulating material, including their environmental advantages, like reduction of raw material content, use of renewable source and of waste material.