THERMAL BEHAVIOR OF HIGH-MOLECULAR-WEIGHT NAPHTHENIC ACIDS
- Authors: Sidorin A.E.1, Polyakova N.V.1, Sukhoverkhov S.V.1, Zadorozhny P.A.1, Mashchenko V.A.1
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Affiliations:
- Institute of Chemistry, FEB RAS, Vladivostok, Russia
- Issue: No 4 (2025)
- Pages: 160-169
- Section: Analysis of natural and man-made objects
- URL: https://journal-vniispk.ru/0869-7698/article/view/351735
- DOI: https://doi.org/10.7868/S3034530825040133
- ID: 351735
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Full Text
Abstract
Thermal behavior of high-molecular-weight naphthenic acids (ARN) has been studied by thermogravimetry, pyrolytic chromatography-mass spectrometry (Py-GC-MS), liquid mass spectrometry and infrared spectroscopy. It is shown that slight degradation of ARN occurs upon heating up to 150°C. There is no decarboxylation of ARN, the acid is thermally stable, and the formation of a rigid film structure is associated with polycondensation of ARN molecules through the formation of anhydrides. Thermal degradation of ARN begins at temperatures above 150°C and is associated with the destruction of the carbon core. The main components of thermal degradation are derivatives of cyclopentane, the structure of which is present in ARN, various oxygen-containing compounds and hydrocarbons with a molecular weight greater than 280 a.u.m.
About the authors
A. E. Sidorin
Institute of Chemistry, FEB RAS, Vladivostok, Russia
Email: sidorin.ae@ich.dvo.ru
Vladivostok, Russia
N. V. Polyakova
Institute of Chemistry, FEB RAS, Vladivostok, Russia
Email: polyakova@ich.dvo.ru
Vladivostok, Russia
S. V. Sukhoverkhov
Institute of Chemistry, FEB RAS, Vladivostok, Russia
Email: svs28@ich.dvo.ru
Vladivostok, Russia
P. A. Zadorozhny
Institute of Chemistry, FEB RAS, Vladivostok, Russia
Email: zadorozhny@mail.ru
Vladivostok, Russia
V. A. Mashchenko
Institute of Chemistry, FEB RAS, Vladivostok, Russia
Email: mba1111@mail.ru
Vladivostok, Russia
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