SYNTHESIS AND STUDY OF MIXED PROPYLENE GLYCOL DIESTERS OF SYNTHETIC PETROLEUM- AND FATTY ACIDS

Abstract

The article presents a one-stage method for the synthesis of mixed diesters based on propylene glycol, synthetic petroleum- and aliphatic fatty acids (C6-C8) using a ZnO catalyst under optimal conditions - temperature -110-120°C, amount of catalyst - 1.3% wt. (by acid), molar ratio of components - acid:alcohol - 2:1.3. The properties of the synthesized mixed diesters were studied and their parameters were determined by analytical and spectral methods. In order to determine the plasticizing properties of the mixed diesters, compositions were prepared under laboratory conditions with the addition 100 m.p. of polyvinyl chloride (PVC) for 30-70 m.p. of synthesized diesters and compared them with an industrial plasticizer - dioctyl phthalate. Also, these diesters have been studied as antioxidants that improve the thermal-oxidative stability of diesel fuel. An analysis of the research results shows that the synthesized mixed diesters can be proposed as effective plasticizers for PVC and new antioxidants for diesel fuels. Keywords: propylene glycol, synthetic petroleum acids, mixed diesters, diesel fuel, antioxidant, polyvinyl chloride, plasticizer