Temperature phase transition in poly(N-isopropylmethacrylamide)/D.sub.2./sub.O solutions as studied by .sup.1./sup.HNMR method
Starovojtova, L.; Hanyková, L.; Ilavský, Michal; Spěváček, Jiří
2002 - English .sup.1./sup.H NMR spectroscopy has been applied to the analysis of the structural-dynamic changes during temperature-induced phase transition in non-ionized and ionized poly(N-isopropylmethacrylamide) solutions in D.sub.2s/sub.O. It was found that formation of compact globular-like structures during the phase transition is independent of polymer concentration for non-ionized samples. Keywords: phase transition; poly(N-isopropylmethacrylamide); D.sub.2./sub.O solutions Available at various institutes of the ASCR Temperature phase transition in poly(N-isopropylmethacrylamide)/D.sub.2./sub.O solutions as studied by .sup.1./sup.HNMR method

.sup.1./sup.H NMR spectroscopy has been applied to the analysis of the structural-dynamic changes during temperature-induced phase transition in non-ionized and ionized poly(N-isopropylmethacrylamide) ...

Starovojtova, L.; Hanyková, L.; Ilavský, Michal; Spěváček, Jiří
Ústav makromolekulární chemie, 2002

Study of supermolecular structure of polymers by light scattering methods
Holoubek, Jaroslav
2002 - English Various optical techniques, especially light scattering methods, have been investigated as potential candidates for characterization of multiphase polymeric materials, i.e. to measure the size, shape and volume fraction of the minor phase and time evolution of morphology. Some supplementary information has been also obtained from model calculatios of dispersed-phase particles changes, time-resolved light scattering experiments and image analysis. Keywords: time-resolved light scattering; image analysis; polymer composites Available at various institutes of the ASCR Study of supermolecular structure of polymers by light scattering methods

Various optical techniques, especially light scattering methods, have been investigated as potential candidates for characterization of multiphase polymeric materials, i.e. to measure the size, shape ...

Holoubek, Jaroslav
Ústav makromolekulární chemie, 2002

Quantum chemical calculations in the structure analysis of polymers
Dybal, Jiří; Brus, Jiří; Schmidt, Pavel
2002 - English Quantum chemical calculations together with NMR and Raman spectroscopy have been used to elucidate the conformational structure and hydrogen-bonding interations in two synthetic polymer systems: water solutions of elastin-like polypentapeptides and chemically modified polysiloxane networks. Keywords: NMR; Raman spectroscopy; polypentapeptides Available at various institutes of the ASCR Quantum chemical calculations in the structure analysis of polymers

Quantum chemical calculations together with NMR and Raman spectroscopy have been used to elucidate the conformational structure and hydrogen-bonding interations in two synthetic polymer systems: water ...

Dybal, Jiří; Brus, Jiří; Schmidt, Pavel
Ústav makromolekulární chemie, 2002

Molecular current switch
Nešpůrek, Stanislav; Sworakowski, J.
2002 - English Scheme of an optically controlled current switch is put forward, based on properties of a conducting polymer containing photochromic moieties chemically attached to the main chain. The idea is supported with results of calculations of local states for charge carriers formed in the vicinity of dipolar species in molecular materials, and with measurements of the drift mobilities in polysilane copolymers containing polar benzaldehyde 2,4-dinitrophenyl-hydrazone groups. Keywords: current switch; local states; dipolar species Available at various institutes of the ASCR Molecular current switch

Scheme of an optically controlled current switch is put forward, based on properties of a conducting polymer containing photochromic moieties chemically attached to the main chain. The idea is ...

Nešpůrek, Stanislav; Sworakowski, J.
Ústav makromolekulární chemie, 2002

Using of Dynamic Thermomechanical Analysis for Study of Glasses
Černošková, Eva; Černošek, Z.; Holubová, J.
2002 - English Model NBS 711 glass was used for DTMA and DSC measurement Realx and imahinary part of modulus. Keywords: dynamic thermomechanical analysis; DSC; glasses; analýza; sklo Available at various institutes of the ASCR Using of Dynamic Thermomechanical Analysis for Study of Glasses

Model NBS 711 glass was used for DTMA and DSC measurement Realx and imahinary part of modulus.

Černošková, Eva; Černošek, Z.; Holubová, J.
Ústav makromolekulární chemie, 2002

Synthesis and Optical Properties of Ge-In-S Glasses Doped by Pr3+ Ions
Bílková, M.; Frumarová, Božena; Frumar, M.; Vlček, M.; Černošek, Z.
2002 - English Praseodymium doped Ge-In-S glasses were prepared and studied. Glasses of the composition 80GeS2 20In2S3 can dissolve relatively large amounts of Pr3+ ions and form stable and homogeneous glasses. Keywords: chalcogenide glasses; luminiscence; Raman spectra Available at various institutes of the ASCR Synthesis and Optical Properties of Ge-In-S Glasses Doped by Pr3+ Ions

Praseodymium doped Ge-In-S glasses were prepared and studied. Glasses of the composition 80GeS2 20In2S3 can dissolve relatively large amounts of Pr3+ ions and form stable and homogeneous glasses.

Bílková, M.; Frumarová, Božena; Frumar, M.; Vlček, M.; Černošek, Z.
Ústav makromolekulární chemie, 2002

Optical Properties of (GeS2)80-x(Ga2S3):xEr2S3 glasses
Ivanova, Z. G.; Černošková, Eva; Černošek, Z.; Vassilev, V. S.
2002 - English Infrared transmisson and photoluminescence of Er-doped (GeS2)80-x(GaS3) glassy host have beeninvestigated. The influence of Er by introduction of Er2S3 (x=0.3, 0.6 and 0.9 mol%) on these properties has been speified. Keywords: chalcogenide glasses; optical properties; luminiscence; luminiscence Available at various institutes of the ASCR Optical Properties of (GeS2)80-x(Ga2S3):xEr2S3 glasses

Infrared transmisson and photoluminescence of Er-doped (GeS2)80-x(GaS3) glassy host have beeninvestigated. The influence of Er by introduction of Er2S3 (x=0.3, 0.6 and 0.9 mol%) on these properties ...

Ivanova, Z. G.; Černošková, Eva; Černošek, Z.; Vassilev, V. S.
Ústav makromolekulární chemie, 2002

Glass Transition and Non-Isothermal Structrural Relaxation
Černošek, Z.; Holubová, J.; Černošková, Eva
2002 - English The aim of present work is to compare the results of the glass transition temperature and DELTA Cp measurements obtained by conventional DSC with information acquired from stepwise DSC technique in the state of the thermal quasi-equilibrium. Keywords: glass transition; non-isothermal relaxation; chalcogenide glasses; sklo; relaxace Available at various institutes of the ASCR Glass Transition and Non-Isothermal Structrural Relaxation

The aim of present work is to compare the results of the glass transition temperature and DELTA Cp measurements obtained by conventional DSC with information acquired from stepwise DSC technique in ...

Černošek, Z.; Holubová, J.; Černošková, Eva
Ústav makromolekulární chemie, 2002

Isothermal Structural Relaxations Temperature and Time Dependencies of Relaxation Parameters
Holubová, J.; Černošek, Z.; Černošková, Eva
2002 - English Keywords: isothermal structural relaxations; relaxation parameters; glass transition; relaxace; parametry Available at various institutes of the ASCR Isothermal Structural Relaxations Temperature and Time Dependencies of Relaxation Parameters

Holubová, J.; Černošek, Z.; Černošková, Eva
Ústav makromolekulární chemie, 2002

Thin Films of Sb2S3 Doped by Sm3+ Ions
Frumarová, Božena; Bílková, M.; Frumar, M.; Repka, M.; Jedelský, J.
2002 - English Pure and Sm3+ doped amorphous thin films of Sb2S3 were prepared by thermal co-evaporation of Sb2S3 and Sm metal. From transmittance measurement, the absorption edge, index of refraction, thickness , Eg opt relative permittivity, single oscillator energy and dispersion energy were determined. Keywords: thin films; luminiscence; photoinduced changes Available at various institutes of the ASCR Thin Films of Sb2S3 Doped by Sm3+ Ions

Pure and Sm3+ doped amorphous thin films of Sb2S3 were prepared by thermal co-evaporation of Sb2S3 and Sm metal. From transmittance measurement, the absorption edge, index of refraction, thickness , ...

Frumarová, Božena; Bílková, M.; Frumar, M.; Repka, M.; Jedelský, J.
Ústav makromolekulární chemie, 2002