Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Kirpichnikov Petr A"'
Publikováno v:
Macromolecular Symposia. 106:387-396
By catalytic trimerization polyurethaneisocyanurates (PUIC) with varying content of isocyanate and oligoester fragments were obtained. The number of triisocyanurate fragments in the PUIC network was determined with infrared spectroscopy and by using
Publikováno v:
Macromolecular Symposia. 106:87-90
Polyurethane metal complexes (PUMC's) have been synthesized on the basis of the polynucleus complexes of Cu(II) and Fe(III), where the metals are connected by chlorine bridges, symmetrical aromatic diisocyanates and azoaromatic compounds; these compl
Publikováno v:
Polymer Science U.S.S.R.. 33:1097-1102
It is shown that free-radical conversions may make a definite contribution to the curing of epoxy oligomers with tertiary amines. On the basis of the use of controlled radical reactions the authors have developed a fundamentally new approach to the d
Autor:
D. G. Pobedimskii, N.S. Kolyubakina, Kirpichnikov Petr A, N. A. Mukmeneva, A. G. Akhmadullina
Publikováno v:
Polymer Science U.S.S.R.. 16:429-436
Accelerated ageing was the method used for investigation of the antioxidative properties (the existence of critical concentrations and the displacement of the latter in the presence of a decomposer of hydroperoxides) of phosphites of the cyclic acid
Some aspects of polymer blend analysis connected with mechanical degradation in the course of mixing
Publikováno v:
Polymer Science U.S.S.R.. 30:2340-2346
The processes of mechanical degradation of polymers during their mechanical mixing have been studied using the binary mixtures of cis-polyisoprene with stereoregular polybutadiene, and with butadiene-methylstyrene or butyl rubbers. Mechanical degrada
Publikováno v:
Polymer Science U.S.S.R.. 19:407-412
By reacting with peroxide radicals organic phosphites inhibit the oxidation of solid polypropylene (PP). A quantitative evaluation of the efficiency of two phosphites was carried out; the inhibiting efficiency of the phosphite containing masked pheno
Publikováno v:
Polymer Science U.S.S.R.. 24:945-951
Rheology and gas-permeation chromatography (GPC) were used to study qualitative and quantitative mechanisms governing the changes in molecular parameters of various industrial rubbers (SKI-3) in mechanical breakdown. A generalizing equation was deriv
Publikováno v:
Polymer Science U.S.S.R.. 26:2025-2033
Change in the MD of butyl rubber on ozonolytic and catalytic degradation of its solutions has been studied. The processes of degradation are not subject to the law of change and are accompanied by an extremal change in the MD. A model is proposed pos
Publikováno v:
Polymer Science U.S.S.R.. 23:803-805
A fairly simple and rapid method is proposed for determining the average number of branches per molecule and average molecular weight of branched polymers. Using polyurethanes it was shown that results obtained by this method satisfactorily agree wit
Publikováno v:
Chemischer Informationsdienst. 6