Full Article: PDF
Scientific Object Identifier: http://s-o-i.org/1.1/TAS-07-39-4
DOI: http://dx.doi.org/10.15863/TAS.2016.07.39.4
Language: Russian
Citation: Vorobyova EV, Lin DG (2016) SOME FEATURES OF THE PHYSICAL BEHAVIOR OF IRGANOX 1010 USED FOR THERMAL OXIDATIVE STABILIZATION OF POLYETHYLENE. ISJ Theoretical & Applied Science, 07 (39): 17-27. Soi: http://s-o-i.org/1.1/TAS-07-39-4 Doi: http://dx.doi.org/10.15863/TAS.2016.07.39.4 |
Pages: 17-27
Published: 30.07.2016
Abstract: The Irganox 1010 phenolic antioxidant introduced into a polyethylene powder from a solution in acetone followed by thermal pressing of the sample in the form of a film is only partially fixed in IR spectra of the polymer. A significant part of the antioxidant additive remains “invisible” in the IR spectra, since it is in the disperse form and is stationed in former inter-powder contact boundaries. The concentration of the antioxidant adsorbed by the polymer increases in samples pressing time and in the duration of their oxidative treatment in air. As the antioxidant diffusively proceeds into the polymer melt, there is a decrease in a relative proportion of hydroxyl groups, which indicates the expenditure of the inhibitor. It is found that at temperatures below the polymer melting point, the hydroxyl groups of the antioxidant may be both free and bound by hydrogen bonds. When transferring the polymer into a melt, the intra- and intermolecular bonds of the antioxidant are largely destructed. This process is reversible: when the polymer is transferred back from a melt into a solid state, the hydrogen bonds are restored again.
Key words: polyethylene melt, IR spectra, antioxidant solution, Irganox 1010, hydrogen bonds, hydroxyl groups concentration, carbonyl groups concentration.
|
