Research the Thermal Decomposition Processes of Copolymers Based on Polypropyleneglycolfumaratephthalate with Acrylic Acid

Research the Thermal Decomposition Processes of Copolymers Based on Polypropyleneglycolfumaratephthalate with Acrylic Acid

Kinetics of thermal degradation of polymeric materials is usually studied by weight loss at a constant temperature or during heating. Hence, the activation energy and other kinetic parameters of the thermal destruction process are determined. One of the fastest and most accessible methods for studyi...

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Bibliographic Details
Published in:Polymers Vol. 15; no. 7; p. 1725
Main Authors: Sarsenbekova, Akmaral Zh, Zhumanazarova, Gaziza M, Tazhbayev, Yerkeblan M, Kudaibergen, Gulshakhar K, Kabieva, Saule K, Issina, Zhannur A, Kaldybayeva, Aigul K, Mukabylova, Arailym O, Kilybay, Muslim A
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 30-03-2023
MDPI
Subjects:
Acrylic acid
Activation energy
Aging
Agricultural production
Composite materials
Composition
Copolymers
Crops
Data processing
Decomposition
Dielectric properties
Gas evolution
Heating
Hydrogels
Infrared spectroscopy
Kinetics
Low molecular weights
Mass spectrometry
Methods
Nitrogen
Polyesters
Polymers
Resins
Sorbents
Spectrum analysis
Thermal analysis
Thermal decomposition
Thermal degradation
Weight loss
dynamic thermogravimetry
polypropyleneglycolfumaratephthalate
thermal degradation
kinetic analysis
activation energy
acrylic acid
preexponential factor
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Summary:Kinetics of thermal degradation of polymeric materials is usually studied by weight loss at a constant temperature or during heating. Hence, the activation energy and other kinetic parameters of the thermal destruction process are determined. One of the fastest and most accessible methods for studying the kinetics of these processes is TGA. Weight methods of TGA do not provide an opportunity to judge the proportion of gaseous degradation products. This is especially true for processes associated with the release of hydrogen and other substances with low molecular weights, the accuracy of determining the amount of which by the weight method is low. Meanwhile, the study of the gas evolution process can provide additional information about the kinetics and mechanism of thermal destruction processes. Of great interest is also the joint study of the total weight loss and gas evolution during the polymer heating. Using mass spectrometry, IR spectroscopy combined with thermal analysis (TGA/DSC-IR and TGA/DSC-MS) we have defined product composition and thermal destruction kinetics. As a result of the TGA/DSC-MS study of gaseous products of thermolysis in nitrogen atmosphere, there were found products with 44, 45, 59, 60, 68, and 88 phr. Quite a similar pattern for p-PGFPh:AA copolymers is also observed in TGA/DSC-IR studies: the same products and the same temperature range. However, in contrast to the TGA/DSC-MS study, CO release was also recorded by this method (weak signal). Kinetic characteristics of the processes were determined based on Friedman, Ozawa-Flynn-Wall and modified NPC methods. Obtained values of the activation energy and thermodynamic characteristics make it possible to predict the composition of polymers, which make a significant contribution to the development of theoretical ideas about the features of the physicochemical properties of polymers.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym15071725