Zobrazeno 1 - 10
of 35
pro vyhledávání: '"V.V. Lisitskii"'
Autor:
V.S. Shmarlin, R.F. Gataullin, S.B. Sal'nikov, I.S. Beresneva, Minsker Karl S, V.V. Lisitskii
Publikováno v:
Polymer Science U.S.S.R.. 25:1960-1966
During the chlorination of butyl rubber unsaturated fragments of type ∼ CH2C(CH3)CHCH2∼ are preferentially transformed into chloropentene units of type of . This is simultaneously accompanied by the formation of internal unsaturated grou
Autor:
V.V Lisitskii, L.F Mulloyanova, N.N Zavodchikova, V.N Bronnikova, D.M Yanovskii, N.I Kubovskaya
Publikováno v:
Polymer Science U.S.S.R.. 26:1813-1818
The influence of propylene units on the thermal degradation of vinyl chloride copolymers containing up to 9·2 mole% propylene units has been evaluated. The ratio of the rate constants of the formation of single double ks : k′s : k″s = 1 : 6·5 :
Correlations between the chemical structure and the thermal stability of polyvinylchloride. A review
Publikováno v:
Polymer Science U.S.S.R.. 23:535-552
The main ideas about the new theory of PVC decomposition are described; they tackle such key questions as the chemical structure and the contents of anomalous groupings in the PVC, their effects on the thermal stability of the products, and the kinet
Publikováno v:
Polymer Science U.S.S.R.. 24:1047-1055
The content of the internal bonds λ0 in the macromolecules has been calculated from change in the mean viscosity molecular mass of PVC on ozonization of the bonds taking into account the MMD and the number of internal bonds in the macromolecules of
Publikováno v:
Polymer Science U.S.S.R.. 22:1228-1233
Industrial and laboratory samples of PVC and PVA contain 5 × 10 −3 mole/mole polymer of unsaturated end groups, however, PVA, unlike PVC is practically free from internal 〉C=C〈 bonds. It was established that at the initial stages overall-deace
Publikováno v:
Polymer Science U.S.S.R.. 24:1299-1306
It is shown that the introduction of vinyl acetate units into the PVC chain raises the random elimination of HCl since the groups—OCOCH3 exert a destabilizing influence on the adjacent vinyl chloride units. At the initial stages of degradation, the
Publikováno v:
Polymer Science U.S.S.R.. 27:1682-1689
A study has been made of changes in the concentration, distribution and chemical structure of unsaturated groups during the chlorination of PVC. It was found that such changes occur irrespective of the method and conditions of chlorination.
Autor:
G.Ye. Zaikov, A.A. Kefeli, K. S. Minsker, S. D. Razumovskii, R.B. Pancheshnikova, V.V. Lisitskii
Publikováno v:
Polymer Science U.S.S.R.. 23:1708-1714
A kinetic study has been made of the interaction of ozone with homo- and copolymers of vinyl chloride, acrylic acid and its esters. It is shown that depending on the nature of monomers in the series vinyl chloride, acrylic acid, methyl acrylate, buty
Publikováno v:
Polymer Science U.S.S.R.. 23:1675-1684
The method of solid- and liquid-phase ozonization has been used to determine the content, distribution and chemical structure of unsaturated CC bonds in the macromolecules of copolymers of vinyl chloride and vinyl acetate (VCVA) containin
Publikováno v:
Polymer Science U.S.S.R.. 23:1204-1209
The content and distribution of unsaturated >C=C bonds in polymer chains and their influence on the thermal stability of emulsion PVC have been evaluated by ozonolysis of PVC in solid and liquid phases. It was found that >C=C endgroups (their content