Síntesis de un material elastomérico a partir de la depolimerización de residuos de espumas de poliuretano

Abstract

Considering the large quantity of polyurethane foams wastes, the chemical recycling of the residues is a useful alternative. On account to this, the development an elastomeric material from the depolymerization of polyurethane foam residues was proposed. The elastomeric material was synthesized from the depolymerization product (PD), which was subjected to a polymerization reaction with diphenylmethane-4,4'-diisocyanate (MDI). To evaluate the influence of the MDI:PD ratio and curing time on the mechanical and thermal properties, a 3 × 2 mixed factorial design was used. The increase of DP in the MDI:PD ratio varies directly to the percentage of elongation and inversely to its breaking strength. On the other hand the curing times did not show a significant difference in the mechanical properties of the synthesized polyurethane material. Finally, the onset temperature of the developed materials was found in the range of 190 - 210 ° C. According to these results, the synthesis of the material obtained with the depolymerization product of polyurethane foams represents an important alternative for the recovery of foam wastes, due to formation of high breaking strength materials.