A Study of Low-Energy Processes in Polymethyl Methacrylate and Its Short-Chain Oligomers by Terahertz IR and Raman Spectroscopies
- Авторлар: Ryzhov V.A.1
-
Мекемелер:
- Ioffe Institute
- Шығарылым: Том 127, № 6 (2019)
- Беттер: 979-983
- Бөлім: Spectroscopy of Condensed Matter
- URL: https://ogarev-online.ru/0030-400X/article/view/166169
- DOI: https://doi.org/10.1134/S0030400X1912021X
- ID: 166169
Дәйексөз келтіру
Аннотация
Based on the data of low-frequency (terahertz) IR and Raman spectroscopies, it is established that low-energy vibrational excitations in PMMA and its oligomers with a degree of polymerization n = 2, 7, 9, and 50 are due to correlated small-angle torsional–vibrational dynamics, which prepares the relaxational mobility of macromolecules. The minimum size of the chain segment (“torsional–vibrational segment”), the spectrum of which is identical to the spectrum of the high-molecular polymer, is determined.
Авторлар туралы
V. Ryzhov
Ioffe Institute
Хат алмасуға жауапты Автор.
Email: v.ryzhov@mail.ioffe.ru
Ресей, St. Petersburg, 194021
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