Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Danica Doskočilová"'
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 23:365-372
NMR spectra of the meso and d,l isomers of methyl-2,4-pentanedicarboxylate and of isotactic, heterotactic, and syndiotactic methyl-2,4,6-heptanetricarboxylate have been measured and analyzed. From the values of vicinal coupling constants the energy d
Autor:
J. Petránek, H. Pivcová, D. Lím, M. Kolinsky, Bohdan Schneider, Danica Doskočilová, Jan Štokr
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 16:215-228
The infrared and NMR spectra of syndiotactic, isotactic, and heterotactic 2,4,6-trichloroheptane, model compounds of poly(vinyl chloride), have been measured over a wide temperature range. Conformational structures of these stereoisomers have been de
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 16:971-976
The polymerization of 2,5-dimethyl-l,5-hexadiene, catalyzed with boron trifluoride and titanium tetrachloride, has been studied. The reaction was followed up in the temperature range of −78 to 20°C. in a solution of heptane, of dichloroethane, and
Publikováno v:
Polymer. 34:432-436
The degradation of polybutadiene by heating in inert atmosphere at various temperatures for different time intervals was characterized by i.r. and 1H n.m.r. methods. It was established that by i.r. analysis it is possible to assess both the temperatu
Publikováno v:
Die Makromolekulare Chemie. 193:2529-2538
The compositional microstructure of partial hydrolyzates of isotactic poly(methyl methacrylate) was analyzed by means of 1 H and 3 C NMR spectroscopy. The placement of hydrolyzed units was found to be essentially random, and no neighbouring group eff
Publikováno v:
Polymer. 34:437-439
The chemical structure of polybutadiene thermally crosslinked at temperatures up to 250°C was characterized by high resolution solid state 13C n.m.r. spectra in combination with high resolution 1H and 13C magic angle spinning n.m.r. spectra of the s
Publikováno v:
Polymer Bulletin. 4:17-23
From the products of hydrolysis of dimethyl 2-methoxymethyl-2, 4-dimethylglutarate, the pure stereoisomers of 2-methoxymethyl-2,4-dimethylglutaric acid and their anhydrides have been prepared. Alkaline hydrolysis of the stereoisomeric anhydrides yiel
Autor:
J. Jakeš, Pavel Schmidt, Danica Doskočilová, Josef Baldrian, Bohdan Schneider, Irmina Hernández-Fuentes, M. Caceres Alonso
Publikováno v:
Polymer. 27:1658-1664
1 H nuclear magnetic resonance (n.m.r.) spectra of low-density polyethylene, static and with magic-angle rotation (MAR), were measured in the range 270–385 K. The amorphous component of the static 1 H n.m.r. spectrum was obtained by subtraction of
Publikováno v:
Angewandte Makromolekulare Chemie. 45:139-150
In the NMR spectra of some types of swollen macroporous cation-exchange resins the NMR signals of the swelling liquid in the pores and in the gel phase have been resolved. From the intensities of these signals the relative volume of pores in the swol
Publikováno v:
Collection of Czechoslovak Chemical Communications. 39:2943-2948