Zobrazeno 1 - 10
of 25
pro vyhledávání: '"M.I. Lifshits"'
Publikováno v:
Polymer Science U.S.S.R.. 17:2132-2142
Studies were made of the temperature relations of proton magnetic relaxation times T1 and T2 at a resonant frequency of 18·6 Mc/s for solutions of PMMA fractions (M = 3×104−1·7×106) in proton free solvents with polymer concentration of 5–80 m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::422466d1940f5f791b9de8bb6316a32a
https://doi.org/10.1016/0032-3950(75)90112-4
https://doi.org/10.1016/0032-3950(75)90112-4
Autor:
M.I. Lifshits, Ye.V. Komarov
Publikováno v:
Polymer Science U.S.S.R.. 25:3039-3046
The PMR line shape has been calculated for crosslinked polymeric gels, using a freely jointed model of a chain with its ends fixed. An equation relating molecular properties of a polymer network to PMR parameters has been derived for isoloted spin pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9d15aa30bb0f4d548a848fbcbd9b464
https://doi.org/10.1016/0032-3950(83)90058-8
https://doi.org/10.1016/0032-3950(83)90058-8
Publikováno v:
Polymer Science U.S.S.R.. 22:967-973
Temperature dependences of the self-diffusion coefficient D of a solvent within the reversible gelation region have been investigated, as well as the spin-lattice T1 and spin-spin T2 relaxation times of protons in the system polyhexadecylacrylate-tol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::893f8db596c0f00dbaa6da6dee56b91e
https://doi.org/10.1016/0032-3950(80)90289-0
https://doi.org/10.1016/0032-3950(80)90289-0
Publikováno v:
Polymer Science U.S.S.R.. 28:1326-1331
An analysis is made of the form of the PMR signal of weakly crosslinked polydimethyl-siloxanes swelling in a solvent. The line of complex form observed may be represented by the superposing of two signals. One belongs to the chains of the network the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8088e5d48de7caa583638c5ec304857b
https://doi.org/10.1016/0032-3950(86)90122-x
https://doi.org/10.1016/0032-3950(86)90122-x
Autor:
M.I. Lifshits
Publikováno v:
Polymer. 28:454-458
The theory of the 2H nuclear magnetic resonance (n.m.r.) lineshape of elastic polymer networks is developed on the basis of existing concepts of quadrupole effects in n.m.r. Averaging of the quadrupole interaction Hamiltonian is carried out with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15b9e97a748b30bee1bfa6b1bece80b4
https://doi.org/10.1016/0032-3861(87)90199-6
https://doi.org/10.1016/0032-3861(87)90199-6
Publikováno v:
Polymer Science U.S.S.R.. 17:1563-1573
Studies were made of temperature relations of proton magnetic relaxation times T1 and T2 of solutions of polystyrene fractions (M = 2 × 103−1·4 × 106) with concentration of 5–40 mole% in proton free solvents of different viscosities and thermo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ae496d3e0c648688eadec6bec853d2d
https://doi.org/10.1016/0032-3950(75)90323-8
https://doi.org/10.1016/0032-3950(75)90323-8
Publikováno v:
Polymer Science U.S.S.R.. 18:2630-2636
Crosslinked and swollen polymer systems have been found to give rise to a ridge on the plots of spin-spin relaxation times T 2 against temperature; this is explained by an incomplete averaging of the nuclear magnetic dipole-dipole interactions during
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94add79784dbe7de54d957f2697f6baa
https://doi.org/10.1016/0032-3950(76)90192-1
https://doi.org/10.1016/0032-3950(76)90192-1
Publikováno v:
Polymer Science U.S.S.R.. 20:467-475
It was established that the formation of a fluctuation network of hydrogen bonds inhibits intramolecular mobility, which determines the rate of longitudinal and transverse magnetic relaxation of protons. The effect of fluctuation network on both rela
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1aa8b338305b53be304133a66bbb695
https://doi.org/10.1016/0032-3950(78)90061-8
https://doi.org/10.1016/0032-3950(78)90061-8
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