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
Цитировать
Поделиться

Другие записи

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