Characterization of Structure and Self-Diffusion of Elastomers by NMR Method

• Authors: T. Kulagina , G. Karnaukh , L. Smirnov
• Languages of publication: EN

Abstracts

EN

In this work the theory of free induction decay in linear and cross-linked flexible polymers with a various average length of a polymeric chain in a wide temperature is represented. It is shown the change of topological structure of linear polymers with increasing of mean molecular weight M_{w}, and at M_{w}>10⁵ the physical network of entanglements starts being formed. The correlation function of molecular motion which is applied to calculation of diffusion attenuation of spin echo is received. The general approach to calculation of signals of diffusion attenuation spin echo and its application for determination of coefficient of self-diffusion in elastomers with various topological structures is offered. It allowed explanation observed experimentally anomalous diffusion.

Keywords

EN

76.20.+q; 76.60.Lz; 77.84.Jd

Discipline

• 76.20.+q: General theory of resonances and relaxations
• 76.60.Lz: Spin echoes
• 77.84.Jd: Polymers; organic compounds

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 4
• Pages: 1128-1132

Dates

published

2015-04

Contributors

author

T. Kulagina

• Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia

author

G. Karnaukh

• Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia

author

L. Smirnov

• Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia

References

• [1] T.P. Kulagina, V.V. Marchenkov, B.N. Provotorov, Polymer Sci. U.S.S.R. 31, 420 (1989)
• [2] T.P.Kulagina, V.M.Litvinov, K.T.Summanen, J. of Polymer Sci. Part B: Polymer Physics 31, 241 (1993)
• [3] T.P. Kulagina, G.E. Karnaukh, L.P. Smirnov, Doklady Phys. Chem. Part 2 421, 216 (2008), doi: 10.1134/S001250160808006X
• [4] M. Kehr, N. Fatkullin, R. Kimmich, J. Chem. Phys. 126, 094903 (2007), doi: 10.1007/b12766
• [5] A.I. Maklakov, V.D. Skirda, N.F. Fatkullin, Samodiffuziya v rastvorakh i rasplavakh (Self-Diffusion in Solutions and Melts). Kazan Uni., Kazan, 1987
• [6] T.P. Kulagina, V.A. Varakina, A.N. Kuzina, Doklady Phys. Chem. Part 2 444, 79 (2012), doi: 10.1134/S0012501612050028
• [7] T.P. Kulagina, G.E. Karnaukh, A.N. Kuzina, L.P. Smirnov, Russian Journal of Phys. Chem. B 7, 170 (2013), doi: 10.1134/S1990793113020036

Identifiers

DOI

10.12693/APhysPolA.127.1128