A method of obtaining of diesters and epoxy diesters of 3,6-endomethylene tetrahydrophthalic acid was studied. The conditions for the synthesis of diesters and epoxydiesters are found and their physic-chemical parameters are determined. A preliminary assessment of the possibility of using the synthesized epoxy diesters as plasticizers for cellulose esters was carried out. It was found that the new esters significantly increase the physicomechanical properties of etrols.
An examination is made of a method for producing symmetric 1,4-butanediol esters in the presence of catalyst titanium nanodioxide of grade R-25 with a surface area of 140.9 m 2 /g and a particle size of 25 nm by the esterification of 1,4-butanediol with aliphatic fatty acids. The esters obtained have been tested as a plasticiser for polyvinyl chloride (PVC).
A new PVC-based composite material was developed in which 1,3-butanediol monoester of a mixture of aliphatic C 8-C 12 fatty acids was used as the plasticiser. The given ester was produced in the presence of catalyst nano-TiO 2 (modification PS-500). The results of the conducted investigations indicate that the created plasticised PVC has far superior physicomechanical properties to industrial dioctyl adipate and dioctyl phthalate.
The paper is dedicated to the synthesis of mixed diester of dietylene glycol with high yield based on the natural petroleum and pentanoic acids using ZnO catalyst aiming the increase of plasticizer and antioxidant sorts. To define the optimum conditions for obtaining mixed diester with high yield, the reactions in the presence of ZnO catalyst of various quality have been carried out in the certain ratio components included in the reaction and temperature intervals. The optimum conditions, i.e. catalyst amount in 1.5 % mass regarding to the acid, molar ratio of the components alcohol: acid - 1.5:2, the temperature 130–140 oC in the highest yield of 92 % have been selected. The physical-chemical indexes of synthesized ester have been specified and material balance of obtainment process showed. For the improvement of thermal-oxidizing steadiness of diesel fuels, diester of diethylene glycol was tested and justified that by adding 0.004 % mass of mixed diester into the diesel fuel, thermal-oxidizing steadiness significantly increases.
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