Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Yu.B. Shilov"'
Autor:
E. T. Denisov, Yu.B. Shilov
Publikováno v:
Kinetics and Catalysis. 42:238-242
The kinetics of chain termination in polypropylene and polyethylene oxidation inhibited by 2,4-dinitrololuene is studied. 2,4-Dinitrololuene inhibits the oxidation of polyethylene and polypropylene lacking hydroperoxide groups by terminating chains i
Autor:
Ye.T. Denisov, Yu.B. Shilov
Publikováno v:
Polymer Science U.S.S.R.. 16:769-775
Kinetic studies were made of iniated oxidation of polyethylene and polypropylene in solution and solid phase. It was shown that, during oxidation of polymers in solution, chain breakage takes place by reaction between the inhibitor and peroxide macro
Autor:
Ye.T. Denisov, Yu.B. Shilov
Publikováno v:
Polymer Science U.S.S.R.. 16:2686-2690
A study was made of kinetic regularities of the initiated oxidation of polyethylene and polypropylene in presence of 2,2,6,6-tetramethyl-4-benzoylpipyridine-l-oxyl. It is shown that the iminoxyl radical inhibits oxidation of the polymers by chain ter
Autor:
Ye.T. Denisov, Yu.B. Shilov
Publikováno v:
Polymer Science U.S.S.R.. 24:938-944
Biphenols 2,2-methylene-bis-(4-methyl-6-tert-butylphenol) and bis-(3,5-ditert-butyl-4-hydroxyphenyl)methane inhibit oxidation of solid PP, rupturing chains with a stoichiometric coefficient of inhibition ≈=2·5dash3·5 at 366°K. On adding these in
Autor:
Yu.B. Shilov, Ye.T. Denisov
Publikováno v:
Polymer Science U.S.S.R.. 16:2009-2016
The kinetics of initiated oxidation of solid isotactic polypropylene in the presence of p-benzoquinone, anthracene and di-o-nitrophenol (DNP) have been studied. It was found that anthracene and DNP terminate chains by reaction with both alkyl and per
Autor:
Yu.B. Shilov, Ye.T. Denisov
Publikováno v:
Polymer Science U.S.S.R.. 25:1384-1393
The kinetics of chain oxidation of a polymer have been analysed theoretically for chain termination in which either alkyl or peroxide radicals participate, for the case when the rate of diffusion of oxygen is commensurate with the rate of oxidation v
Autor:
Ye.T. Denisov, Yu.B. Shilov
Publikováno v:
Polymer Science U.S.S.R.. 29:1492-1497
In oxidizable PP the stoichiometric inhibition coefficient f for the bisphenols is higher by an order if the polymer is first oxidized and contains hydroperoxide groups. Regeneration of the inhibitor with the participation of HO2 radicals explains th
Autor:
Ye.T. Denisov, Yu.B. Shilov
Publikováno v:
Polymer Science U.S.S.R.. 19:1435-1446
A study has been made of the decomposition of hydroperoxide groups POOH in oxidized PP and PE in an inert atmosphere and under conditions of oxidation at 92 and 114°C. The inhibitor method has been used to measure the rate of initiation by benzoyl p
Autor:
Ye.T. Denisov, Yu.B. Shilov
Publikováno v:
Polymer Science U.S.S.R.. 26:1964-1971
A study was made of the inhibiting action of a number of binuclear quinones on oxidation of PP and PE in the solid phase under conditions of initiated oxidation at 366°K. Quinones terminate chains by reaction with alkyl and peroxide macroradicals. I
Autor:
Yu.B. Shilov, N.F. Dzhanibekov
Publikováno v:
Polymer Science U.S.S.R.. 30:199-206
In the regime of induced oxidation the authors have studied quantitatively the inhibiting effect of nickel O,O-diphenyldithiophosphate (Ni(DTP)2) on the oxidation of polypropylene. The inhibition coefficient for Ni(DTP)2 is 1·5 ± 0·5. It was estab