Degradation Studies of Montmorillonite/Polyurethane Nanocomposites
In order to achieve energy saving and environmental protection,the research and utilization of solid waste polyurethane is realized.Using monocomponent di-propylene glycol(PG)and polyethylene glycol(PEG)as the alcoholysis agent of the two-component diols,alkali metal sodium hydroxide as the metal catalyst,and montmorillonite clay(MMT)as the modifier,the degradation products were utilized to re-prepare montmorillonite/polyurethane nanocomposites with excellent performance,and to re-prepare nano-foam materials.And a series of tests and analyses were carried out on the degradation products and nanofoam materials.The results show that when m(PG):m(PEG)=40:60,sodium hydroxide is 1.0 g,montmorillonite addition is 0.3 g,the polyurethane nanomaterials can achieve the best degradation effect,the apparent density of the newly prepared nano-foam material is 0.05 g/cm3,the compressive strength is 0.41 MPa.At this time,the nano-foam material has a smaller thermal conductivity and better cold-retaining performance,and meets the requirements of the national standard.
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