carboxyl group


Today there is a problem of rational use of coal coking by-products, which can be partially solved by obtaining a variety of polymeric materials on their basis. The presence of valuable reactive substances (indene, coumarone, styrene, etc.) in this type of raw materials contributes to the solving of the problem. An important aspect is the area of application of the resulting polymers.

Petroleum resins for bitumens modification

The process of tar and industrial petroleum resin “Piroplast-2” joint oxidation has been investigated. The experimental results of the main regularities researches of the obtaining process of petroleum resins with carboxyl groups based on the pyrocondensate C9 fraction of hydrocarbon feedstock pyrolysis have been shown. It has been established that synthesized petroleum resins may be used for the modification of petroleum bitumens.

Polyesters on the basis of petroleum resin and polyethylene glycols

New polyesters have been obtained on the basis of C9 petroleum resin with carboxyl groups and polyethylene glycols. The average molecular mass of the petroleum resin is 1050, its functionality = 1.74. Optimal for the polyesters synthesis is the equimolar ratio between the initial compounds. The reaction is performed in the melt in the presence of p-toluenosulphuric acid as the catalyst. In the optimal temperature range 150 - 190oC the yield of the process ranges from 91 to 94 % depending on the conditions.

Investigation of Functional Carboxy-Containing Oligomers by IR and NMR Spectroscopy

New functional oligomers have been synthesized via intereaction of epoxy oligomers with carboxylic ones or with dibasic carboxy acids. In some cases synthesis was accompanied by ROP-polymerization of DGEBA, initiated by carboxylic oligomer. The structure of obtained products was investigated by IR, 1Н and 13C NMR spectroscopy.