Zobrazeno 1 - 10
of 66
pro vyhledávání: '"V.M. Gol'dberg"'
Publikováno v:
Polymer Degradation and Stability. 74:371-385
The mechanistim of carbon black (CB) effects on the thermo-oxidative degradation of linear low density polyethylene (LLDPE) was studied. Quantitative measurement, in both the kinetic and diffusion mode, of the kinetics of LLDPE's thermo-oxidative deg
Publikováno v:
Polymer Degradation and Stability. 45:47-55
The kinetics of thermal and thermo-oxidative degradation of polystyrene (PS) alone and in the presence of 4,4′-isopropylidene bis (2,6-dibromophenol) were investigated. It was shown that the retardant affects the thermo-oxidative degradation of PS.
Publikováno v:
Polymer Science U.S.S.R.. 33:2445-2452
During high-shear extrusion with a disc extruder, materials based on PP-HDPE blends are obtained that have properties that differ (towards an increase in the strength properties) from those of the same blends obtained by simple mechanical mixing. The
Publikováno v:
Polymer Degradation and Stability. 20:93-121
A kinetic model has been presented for the mechanism of the inhibited autooxidation of polymers. In addition to the reaction of the peroxide radical RO2• with the radical In• (stage 8) and the molecule InH (stage 7) of the inhibitor, which are ty
Publikováno v:
Polymer Science U.S.S.R.. 27:2298-2306
The mechanism of action of an oxidation inhibitor of the polyolefines in the melt is proposed. The test object was LDPE inhibited with a biphenolic anti-oxidant. The concentration functions of the induction period of thermo-oxidation of LDPE have bee
Publikováno v:
Polymer Science U.S.S.R.. 17:348-355
The dependence of the length of induction period of polystyrene (PSt) oxidation on concentration was studied at 200°C using four inhibitors, namely Ionol, Neozon D, and the anti-oxidants 2246 and 4010 Na. These inhibitors, i.e. phenols and amines, w
Publikováno v:
Polymer Science U.S.S.R.. 20:1110-1116
The mechanism of oxidation of low density polyethylene (LDPE) at room temperature, and the effect of oxygen diffusion on the process, have been studied. Ionizing radiation was used to initiate oxidation. The use of a model of a semi-infinite medium e
Autor:
G.Ye. Zaikov, D.Ya. Toptygin, A.A. Kefeli, S. D. Razumovskii, I. S. Gaponova, G.B. Pariiskii, V.M. Gol'dberg
Publikováno v:
Polymer Science U.S.S.R.. 20:2289-2298
The EPR methods has been used to investigate kinetic regularities of the formation and decay of peroxide radicals in the ozonolysis of solid polystyrene and polyvinylcyclohexane. It is shown that peroxide radicals are formed mainly through interactio
Publikováno v:
Polymer Science U.S.S.R.. 27:734-738
Methods are proposed for determining MD of polypropylene by temperature precipitation. Conditions of temperature fractionation in a O solvent were established experimentally and confirmed theoretically; constants were calculated for the conversion of
Publikováno v:
Polymer Degradation and Stability. 16:291-296
The multiple processing of high-density polyethylene by extrusion is shown to be accompanied by considerable changes in molecular weight. In the presence of the inhibitor ionol, only degradation occurs; that is, the molecular weight decreases at a co