Email this article Determination of the Boundary Transition Temperatures in Polypropylene on the Basis of Measurements in the Terahertz Band
- Authors: Kitai M.S.1, Nazarov M.M.2, Nedorezova P.M.3, Shkurinov A.P.4,5
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Affiliations:
- Institute of Photon Technologies of the Federal Research Center “Crystallography and Photonics” of the Russian Academy of Sciences
- Kurchatov Institute
- N. N. Semenov Institute of Chemical Physics of the Russian Academy of Sciences
- Institute of Problems of Laser and Information Technologies of the Federal Research Center “Crystallography and Photonics” of the Russian Academy of Sciences
- M. V. Lomonosov Moscow State University
- Issue: Vol 60, No 5 (2017)
- Pages: 409-416
- Section: Article
- URL: https://journal-vniispk.ru/0033-8443/article/view/243801
- DOI: https://doi.org/10.1007/s11141-017-9810-2
- ID: 243801
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Abstract
We propose a method for determination of the boundary temperatures of transitions in the structure of polymers by means of analyzing the refractive index of these materials in the terahertz band. The temperatures of glass transition, crystallization, and melting are determined experimentally for isotactic and syndiotactic polypropylenes. Such polymers have low absorption coefficients in the terahertz band. The behavior of intermolecular oscillations of the macromolecules, which are active in polymer spectra in this frequency band, is analyzed.
About the authors
M. S. Kitai
Institute of Photon Technologies of the Federal Research Center “Crystallography and Photonics” of the Russian Academy of Sciences
Author for correspondence.
Email: mkitai@mail.ru
Russian Federation, Troitsk
M. M. Nazarov
Kurchatov Institute
Email: mkitai@mail.ru
Russian Federation, Moscow
P. M. Nedorezova
N. N. Semenov Institute of Chemical Physics of the Russian Academy of Sciences
Email: mkitai@mail.ru
Russian Federation, Moscow
A. P. Shkurinov
Institute of Problems of Laser and Information Technologies of the Federal Research Center “Crystallography and Photonics” of the Russian Academy of Sciences; M. V. Lomonosov Moscow State University
Email: mkitai@mail.ru
Russian Federation, Shatura; Moscow
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