THE ROLE OF SOME PETROLEUM POLYMER RESINS IN LONG-TERM BRAKING THERMAL OXIDATION OF ETHYLENE COPOLYMER WITH VINYL ACETATE IN THE PRESENCE OF A PHENOLIC ANTIOXIDANT
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
KNITU; KNRTU
2.
OOO "Sibur"
3.
Kazan National Research Technological University
4.
OOO "Sibur PoliLab"
5.
KNITU
6.
KNRTU
7.
KNITU
8.
Naberezhnochelninskiy gosudarstvennyy pedagogicheskiy universitet
9.
Kazan National Research Technological University
(rektor)
10.
Kazan National Research Technological University
Kazan, Russian Federation
Kazan, Russian Federation
Type:
Article
Pages:
from 79
to 84
Status:
Published
Received:
25.12.2025
Accepted:
25.12.2025
Published:
25.12.2025
Language:
Russian
Keywords:
PETROLEUM POLYMER RESINS, ETHYLENE-VINYL ACETATE COPOLYMER, ATR IR SPECTROSCOPY, NMR SPECTROSCOPY, THERMAL OXIDATION, PHENOLIC ANTIOXIDANTS
Abstract (English):
The polymer compositions based on ethylene-vinyl acetate copolymer in the presence of petroleum polymer resins were analyzed in order to confirm the thermal stabilizing properties of these modifiers. Resins with different contents of various structural fragments - aromatic, methyl, methylene, methine, fragments with a double bond - were selected for the study. Spectra of the samples were obtained using infrared spectroscopy by the attenuated total reflection method (IR ATR). An analysis was made of the relative intensity of signals reflecting the presence of oxygen-containing groups formed as a result of thermal oxidation of ethylene units in the compositions over a period of 24 hours. The sources of these signals were the stretching vibrations of carbonyl groups and C-O-C bonds. The data were compared with the results for polymer materials based on ethylene-vinyl acetate copolymer and high-pressure polyethylene modified with C5-9 and 2353 petroleum polymer resins, as well as with the data for control samples not subjected to thermal aging. The results of the IR spectroscopy of the IR ATR showed that all the selected resins possessed thermostabilizing capabilities to varying degrees. Inhibition of oxidation of the samples was detected, depending on the grade of the petroleum polymer resin. It was suggested that, in the case of using a petroleum polymer resin in the formulation of the polymer composite, the function of a hydrogen donor in the process of inhibiting the thermal oxidation of high-molecular compounds can be performed by hydrogen atoms of polycyclic aromatic fragments of petroleum polymer resins. The positive effect of the antioxidant action of petroleum polymer resins together with the phenolic antioxidant Irganox 1010 is noticeably manifested in the process of a long-term process of polymer thermal oxidation, which can be due to the restoration of a more active phenolic antioxidant due to a less active resin.
The polymer compositions based on ethylene-vinyl acetate copolymer in the presence of petroleum polymer resins were analyzed in order to confirm the thermal stabilizing properties of these modifiers. Resins with different contents of various structural fragments - aromatic, methyl, methylene, methine, fragments with a double bond - were selected for the study. Spectra of the samples were obtained using infrared spectroscopy by the attenuated total reflection method (IR ATR). An analysis was made of the relative intensity of signals reflecting the presence of oxygen-containing groups formed as a result of thermal oxidation of ethylene units in the compositions over a period of 24 hours. The sources of these signals were the stretching vibrations of carbonyl groups and C-O-C bonds. The data were compared with the results for polymer materials based on ethylene-vinyl acetate copolymer and high-pressure polyethylene modified with C5-9 and 2353 petroleum polymer resins, as well as with the data for control samples not subjected to thermal aging. The results of the IR spectroscopy of the IR ATR showed that all the selected resins possessed thermostabilizing capabilities to varying degrees. Inhibition of oxidation of the samples was detected, depending on the grade of the petroleum polymer resin. It was suggested that, in the case of using a petroleum polymer resin in the formulation of the polymer composite, the function of a hydrogen donor in the process of inhibiting the thermal oxidation of high-molecular compounds can be performed by hydrogen atoms of polycyclic aromatic fragments of petroleum polymer resins. The positive effect of the antioxidant action of petroleum polymer resins together with the phenolic antioxidant Irganox 1010 is noticeably manifested in the process of a long-term process of polymer thermal oxidation, which can be due to the restoration of a more active phenolic antioxidant due to a less active resin.
Keywords:
PETROLEUM POLYMER RESINS, ETHYLENE-VINYL ACETATE COPOLYMER, ATR IR SPECTROSCOPY, NMR SPECTROSCOPY, THERMAL OXIDATION, PHENOLIC ANTIOXIDANTS
PETROLEUM POLYMER RESINS, ETHYLENE-VINYL ACETATE COPOLYMER, ATR IR SPECTROSCOPY, NMR SPECTROSCOPY, THERMAL OXIDATION, PHENOLIC ANTIOXIDANTS
