The composition study of terpenoidmaleic adducts

Abstract

The work contains studies of the chemical composition of adducts on the basis of terpenoids and maleic anhydride to provide controlled synthesis on the basis of their secondary products with specified performance characteristics. The determination of the qualitative and quantitative composition of the mixtures of resin acids of pine turpentine and rosin by their methyl esters was performed with GLC analysis; the components of pine resin, rosin, turpentine, adducts was performed with NMR spectroscopy, functional groups in the original terpenoid resins and products of their interaction with oxygen-containing compounds (maleopimaric acid) and terpenoidmaleic adducts by the method of IR spectroscopy. Good convergence of the results obtained by NMR spectroscopy and GLC analysis on the composition of pine resin, gum rosin and turpentine confirms their authenticity. Using the obtained experimental and calculated data the composition of terpenoidmaleic adducts wasset. When obtaining resin terpenoidmaleic adducts, the composition of turpentine solution of resin varied in the range from 30/70 to 70/30 wt %, the calculated amount of maleic anhydride to link all resin acids with conjugated double bonds and terpene hydrocarbons varied from 57.7 to 38.3 wt %. It is shown that when modification of turpentine composition from 30/70 to 70/30 wt % with maleic anhydride increases, there is a significant change in the compositions of obtained terpenoidmaleic adducts of rosin. When comparing experimental data and theoretical calculations regularity is established in the change of composition of terpenoidmaleic of rosin adducts obtained from various terpentine: content of maleopimaric acid naturally increases with the increase of resin acids and the content of terpenoidmaleic adducts decreases. It is shown th at terpinoidmaleic adducts are multicomponent sys-tems composed of maleopimaric acid, terpinolene ad ducts, and of resin acids, which do not react with maleic anhydride. By varying the composition of the turpentine and the amount of maleic anhydride, adducts with different content components can be obtained, and hence, regulating their specifications. The efficiency of using the methods of NMR and IR spectroscopy to study the composition terpenoidmaleic adducts is demonstrated.