Synthesis and Characterization of Insulation Resins Based on Unsaturated Polyesters

 
A solvent-free resin, called solvent-free varnish, contains a reactive diluent (typically a monomer) to lower viscosity instead of solvent, and also has a catalyst to accelerate curing. The reactive diluent participates in the curing reaction. In this study, unsaturated polyester (UPE) varnishes with electrical insulation properties were produced. The curing process of UPE varnishes was carried out with two different reactive monomers, vinyl toluene (VT) and 1,4-butanediol dimethacrylate (BDDMA). Various physical tests (viscosity, density, solids content, etc.) to determine the properties of resins, electrical insulation (volumetric and surface electrical resistance, etc.), Fourier Transform Infrared Spectrophotometer (FTIR) for chemical structure analysis, and thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) analysis to determine the thermal properties synthesized resin were used. In addition, since environmentally friendly and very low VOC products are targeted, VOC measurement was made to determine this. As a result of the study, the thermal decomposition temperature was increased and the VOC value was reduced in the BDDMA crosslinked resins.