Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules

摘要: Abstract Rigid PU foams are properly recycled by a single-phase glycolysis process employing crude glycerol as transesterification agent. A high pure recovered polyol (71% of purity) was obtained using mass ratio scraps to 1 1, reaction temperature 190 °C and stannous octoate catalyst in 1.3 wt% concentration. foam composites containing thermoregulating microcapsules constituted paraffin core (Rubitherm®RT27) polymer shell material (LDPE EVA) were glycolyzed, allowing recover the components separately. This way, both composite can be reused manufacturing new products; demonstrating for first time viability chemical recycling this kind composites. Besides, developed successfully applied different proportions between hard soft segments, its robustness. Finally, polyols employed replace raw rigid polyether synthesis foams. The most important physical mechanical properties (density, maximum compressive strength Young modulus) maintained constant incorporation up 25 wt% coming from conventional 37.5 wt% with microcapsules. Regarding effective thermal conductivity, it remained constant, even 100 wt%