Pyrolysis of cyclo-aromatic diesters

Abstract

Studies on the pyrolysis of cyclo-aromatic diesters derivatives of 3-phenylprop-2-en-1-ol are presented. The diesters are obtained during catalyzed esterification process of a stoichiometric ratio of 3-phenylprop-2-en-1-ol with suitable cycloaliphatic or aromatic acid anhydride in the solvent-free medium. As an acid anhydrides cyclohexane-1, 2-dicarboxylic anhydride, cis-4-cyclohexene-1,2-dicarboxylic anhydride, bicyclo[2.2.1]-5-heptene-2,3-dicarboxylic anhydride, and phthalic anhydride were applied. The thermal properties of obtained compounds under inert atmosphere were tested by means of differential scanning calorimetry and thermogravimetry coupled with FTIR analysis. The pyrolysis products were determined and the probable mechanism of their decomposition was proposed.

Novel bio-based flexible epoxy resin from diglycidyl ether of bisphenol A cured with castor oil maleate

“…The FTIR signals were assigned using the literature data. 25,33,34 The absorption signals appeared in the range 3772-3548 cm À1 with peaks located at 3734 and 3629 cm À1 may be assigned to water vapours traces. The signal from 3253 cm À1 was attributed to the presence of some compounds such as: alcohols, phenols and acetylene derivatives.…”

“…It may be seen that the thermal degradation occurs in at least two stages accompanied by evolution of volatile products, confirming the results obtained in the kinetic analysis section. The FTIR signals were assigned using the literature data 25,33,34 . 6.…”

TMSCl Promoted Direct Conversion of Cyclic Anhydrides to (Un)Symmetric‐Diesters/Amide Esters

“…[5] Cyclic anhydrides are the crucial source of dicarboxylic acid esters; their bis-esterification is generally carried out in boiling alcohol using strong Brønsted acids like H 2 SO 4 . [6] Several other protic acids, such as HCl, [7] p-toluenesulfonic acid, [8] butylstannoic acid, [2,9] and sulfuric acid-based ionic liquids [10] have been employed as catalysts. These acids are strongly corrosive, requiring high temperatures and azeotropic water removal to prevent hydrolysis.…”