Zobrazeno 1 - 10
of 53
pro vyhledávání: '"L.M. Romanov"'
Publikováno v:
Polymer Science U.S.S.R.. 18:1572-1577
MWD of dissolved polyoxymethylene (POM) was studied by UMR in the presence of crystalline POM. It was shown that MWD of oligomers as a result of attaining polymerization-depolymerization equilibrium at a temperature of 39–80° tends to the most pro
Publikováno v:
Polymer Science U.S.S.R.. 29:310-315
The 13C NMR method has been used to investigate the MD of linear formaldehyde oligomers in mixed solvents containing in addition to water an organic component — DMSO, sulpholane or dimethylsulphone (up to 60 wt.%). The values of the equilibrium con
Publikováno v:
Polymer Science U.S.S.R.. 16:2554-2558
Some polyethyleneglycols, oligomers of formaldehyde and copolymers of formaldehyde and ethylene oxide have been studied by high resolution NMR spectroscopy in the presence of tris-(dipivalomethanato)europium (Eu(DPM) 3 ). It is shown that the magnitu
Publikováno v:
Polymer Science U.S.S.R.. 19:26-35
The redistribution with respect to molecular weight of the dimethyl ethers of polyoxymethylene glycol (DE) in the presence of the cationic catalyst SnCl4 in benzene has been investigated. The equilibrium concentration of the cyclic monomers (trioxan
Publikováno v:
Polymer Science U.S.S.R.. 19:480-484
γ-Resonance spectroscopy was used to study the structure of complex catalysts formed during polymerization of formaldehyde in the presence of Sn(II) capronate. It was shown that a there coordination complex Sn(C5H11COO)2·CH2O is formed at the initi
Publikováno v:
Polymer Science U.S.S.R.. 17:2220-2226
Crystallization of polyoxymethylenes during the course of formation has been studied. The process was simulated by the reaction of redistribution with respect to molecular weight of the dimethyl ethers of poly(oxymethylene glycols) (DEPOMG) in benzen
Publikováno v:
Polymer Science U.S.S.R.. 5:747-750
Publikováno v:
Polymer Science U.S.S.R.. 5:903-907
Publikováno v:
Polymer Science U.S.S.R.. 6:2410-2418
Publikováno v:
Polymer Science U.S.S.R.. 10:2898-2903