ИК-спектроскопический анализ молекулярной и надмолекулярной структур композитов с полиэтиленовой матрицей при термических воздействиях «in situ»

Abstract

When creating innovative competitive composite materials, modifiers of different chemical nature (metals and their oxides, antioxidants, pigments, antislips, etc.) are introduced into the polymer matrix, which improve the operational and technological properties of the material. However, any modifier affects the molecular and supramolecular structure of the polymer, and its effect is particularly pronounced when exposed to heat. For example, metals with a change in valence and their oxides are catalysts for oxidation, while organic antioxidants, on the contrary, inhibit this process. The question arises: how to quickly assess the effect of the modifier on the polymer structure. We used the method of IR spectroscopy, a feature of the methodological approach was that the IR spectra were taken in the mode of heating, isothermal exposure and cooling of samples located in a thermal cuvette in the device. This approach to obtaining readings directly during a test experiment is called "in situ".