Wszystkie pola: krawczyk,, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dielectric Spectroscopy Studies of 4-Cyano-3-fluorophenyl 4-Butylbenzoate Liquid Crystal at High Pressure
Autorzy:: Rozwadowski, T.
Massalska-Arodź, M.
Juszyńska, E.
Krawczyk, J.
Wojnarowska, Ż.
Paluch, M.
Powiązania:: https://bibliotekanauki.pl/articles/1419574.pdf
Data publikacji:: 2012-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.M-
77.22.Gm
Opis:: For 4-cyano-3-fluorophenyl 4-butylbenzoate, nematic glassformer at ambient pressure, dielectric relaxation studies were performed under elevated pressure. In the isobaric experiment, on cooling the nematic phase two superarrhenius α-relaxations, ascribed to the reorientations of molecules around short axes and precession of long molecular axes were found and the Arrhenius β-relaxation related to intramolecular motions. Complexity of dynamics at elevated and ambient pressure is similar. Shift towards lower frequencies was found for both α-relaxations.
Źródło:: Acta Physica Polonica A; 2012, 122, 2; 378-381
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Molecular Dynamics of 4-Cyano-3-Fluorophenyl 4-Butylbenzoate as Studied by Dielectric Relaxation Spectroscopy
Autorzy:: Massalska-Arodź, M.
Krawczyk, J.
Juszyńska, E.
Kocot, A.
Inaba, A.
Powiązania:: https://bibliotekanauki.pl/articles/1538189.pdf
Data publikacji:: 2010-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.kj
64.70.M-
77.22.Gm
Opis:: Dielectric α-relaxation connected with reorientations of the 4-cyano-3-fluorophenyl-4-butylbenzoate molecules around short axes in the isotropic and nematic phases is presented. In the nematic phase the super-Arrhenius temperature dependence of the relaxation has been found. Vitrification of the supercooled nematic phase is shown. Below glass transition temperature the secondary β-relaxation has been identified and described well by the Arrhenius temperature dependence on cooling and on heating. After softening of glass to the metastable nematic phase a spontaneous crystallization occurs as for some other low-weight molecular glass formers.
Źródło:: Acta Physica Polonica A; 2010, 117, 4; 532-536
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The Solid State Polymorphism and Dynamics of 2,3-Dimethylbutan-2-ol (2,3-DM-2-B)
Autorzy:: Juszyńska, E.
Massalska-Arodź, M.
Zieliński, P.
Krawczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/1418234.pdf
Data publikacji:: 2012-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 65.40.-b
65.40.Ba
66.30.hp
77.22.Gm
Opis:: In the paper we present adiabatic calorimetry and dielectric spectroscopy results for 2,3-dimethylbutan-2-ol (2,3-DM-2-B), one of the isomers of neohexanol. For 2,3-DM-2-B we have detected the following phase transitions: C2 (249.8 K) → C1 (262 K) → Is. No glass phase was found. In both crystalline phases C2 and C1 three relaxation processes were detected. These processes are discussed in relation to the calorimetric studies.
Źródło:: Acta Physica Polonica A; 2012, 122, 4; 693-697
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Solid State Polymorphism and Dynamics οf 2,2-Dimethylbutan-1-ol as Studied by Adiabatic Calorimetry and Dielectric Spectroscopy
Autorzy:: Juszyńska-Gałązka, E.
Zieliński, P.
Massalska-Arodź, M.
Krawczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/1399009.pdf
Data publikacji:: 2013-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 65.60.+a
77.22.Gm
64.70.P-
Opis:: 2,2-dimethylbutan-1-ol, known as neohexanol, was studied by adiabatic calorimetry and dielectric spectroscopy. Details of complex solid state polymorphism and relaxational dynamics were identified and described. System of phases of neohexanol was found to be monotropic with three orientationally disordered crystalline phases besides isotropic liquid and ordered crystal. Moreover, two subsequent glass transition anomalies of heat capacity $C_{p}(T)$ were detected on heating in one of the supercooled orientationally disordered crystalline phases. Thermodynamical properties of neohexanol are described in relation to the dielectric relaxation processes found.
Źródło:: Acta Physica Polonica A; 2013, 124, 6; 917-925
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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