Preparation of epoxy resin curing agent using waste PET

Waste polyester(PET) was alcoholized with propanetriol and then the resulting product reacted with monoethanolamine to obtain a novel epoxy resin curing agent.The effects of the ratio of reacting materials,dosage of catalyst,reaction temperature,etc.on the yield of the product were investigated,and the optimal process conditions were determined.The structure of the curing agent was characterized by using the infrared spectroscopy(FT-IR),and the thermal stability was illustrated by using thermal gravity analysis(TGA).The optimal process conditions for preparing the epoxy resin curing agent using waste polyester are: the mass ratio of the alcoholized product to monoethanolamine 1∶1.2,catalyst 1∶0.01,and reaction temperature 150 ℃.