Study On Depolymerization And Reclaimation Of Polyurethane Fiber Waste

Spandex silk waste recycling as a research purpose, its degradation alcoholysis alcoholysis agent, the select temperature alcoholysis time, alcohol solution chosen catalyst, amount of catalyst, the alcohol solution dosage process conditions. By single factor and orthogonal experiments of various factors in alcohol solution selection, optimum conditions for alcoholysis alcoholysis temperature is generally100～300℃, the alcohol solution time is generally2to4hours organic tin-based catalyst selectivity better alcohol solution, the alcohol solution dosage Usually for spandex Feisi amount2to4times, the amount of catalyst is1to3%.Means of IR, H-NMR analysis, this paper glycolysis products were analyzed and identified by on the analysis of the spectra:the spandex Feisi product depolymerization general upper waxy solids polytetrahydrofuran substances, the underlying material bythe identification even after more than amines, alcohol amines, esters, amides, ethers and other organic mixture was separated.Finally, for the utilization of the depolymerization product recycling study, we use the upper depolymerization products polytetrahydrofuran synthetic polyurethane elastomeric film, and its performance was tested. Underlayer depolymerization product and furfuryl alcohol were mixed to prepare the furan resin, and its performance was tested. Tested, we found that the use of the samples recovered product, product performance and pure performance, there is a certain gap, further research is needed.