2022 (1) 6
https://doi.org/10.15407/polymerj.44.01.068
PYROLYTIC MASS-SPECTROMETRY OF THE OLIGOISOPRENE WITH OF TERMINAL HYDROXYL GROUPS
V.P. Boiko,
Institute of macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine,
e-mail: boikovital41@i.ua
ORCID: 0000-0002-0157-6664
V.K. Grishchenko,
Institute of macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine,
e-mail: oligomer8@gmail.com
ORCID: 0000-0002-4951-936X
T.V. Dmitrieva,
Institute of macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine,
ORCID: 0000-0002-3526-8395
V.I. Bortnytskiy,
Institute of macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine,
ORCID: 0000-0003-4954-6533
Polym. J., 2022, 44, no. 1: 68-75.
Section: Polymer synthesis.
Language: Ukrainian.
Abstract:
Pyrolytic mass spectrometry was used to evaluate the effect of terminal hydroxyl groups on the composition of thermal degradation products of oligoisoprene obtained using hydrogen peroxide as an initiator in the isopropyl alcohol solution. To interpret the mass spectra of the oligomer, the mass spectra of some low molecular weight alcohols were used. Oxygen-containing groups were found in the mass spectrum of the oligomer, confirming the presence of two types of hydroxyl groups. Peak m/z = 85 corresponds to the fragment from the terminal unit of isoprene directly connected with the primary hydroxyl group, and peak m/z = 127 does the same unit with the terminal fragment of isopropyl alcohol with the tertiary hydroxyl group. This conclusion is confirmed by the presence of peaks resulting from the transformations of the end groups of atoms in the oligomer, which are modeled by the corresponding low molecular weight alcohols.
Keywords: liquid rubbers, hydroxyl groups, hydrogen peroxide, isopropyl alcohol, thermal degradation products.
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