Determination of the physical network of entanglements and the molecular mobility in linear flexible polymers by the NMR method

In the present paper, a theory of free induction decay in linear flexible chain polymers is developed. Theoretical and experimental dependences of the spin-spin relaxation time T2 on the average molecular weight M w and temperature are compared. It is shown that, with increasing Mw, the topological structure of linear polymers changes, and at Mw > 105, a physical network entanglements (quasi-network) is formed. A correlation function of molecular motions is obtained, which indicates whether the quasi-network is formed in polymer melts. © Pleiades Publishing, Ltd., 2014.

Авторы
Kulagina T.P.1 , Varakina V.A. 2 , Kuzina A.N. 1
Номер выпуска
3
Язык
Английский
Страницы
391-395
Статус
Опубликовано
Том
8
Год
2014
Организации
  • 1 Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russian Federation
  • 2 People's Friendship University of Russia, Moscow, Russian Federation
Ключевые слова
Linear flexible chain polymers; Molecular mobility; Nuclear magnetic resonance; Topological structure
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/5017/
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Voskressensky L.G., Borisova T.N., Chervyakova T.M., Matveeva M.D., Galaktionova D.V., Tolkunov S.V., Tolkunova V.S., Eresko A.B., Varlamov A.V.
Химия гетероциклических соединений. Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau. Том 50. 2014. С. 1338-1345