SCIENTIFIC ABSTRACT YU.P. DOLGOKER - B.A. DOLGOPLASK

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000410810014-2
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 13, 2000
• Sequence Number: 14
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

DOLGOKER,-..Yv.P.; MOTO, N.V.; ZHIGULIM, V.I., inzli.;
BEDA, N.I.v lnzh.;
I
RYZHKOV, P.Yu., irmh.; G).iRIIDV, A.I., inzh.;
CHEMUNCT, VX.,
kand. tekhn. nauk
New developmento in research. Stall 23 no.10:928-929 0
163.
(MIRA 16M)

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USSR/Organic Chemistry - Theoretical and General questiono on
Orgunic Chemistry,
E-1
Abet Journalt Referat Zhur - 14timiye., No 19, 1956.. 61379
Author: Tinyakova, je. I., Dolgoplook, B. A., Tikhemolov&, M.
P.
Institution: None
Title: Reactions of Free Radicals in Solutions. III. Simly of
the Re-
actions cif Free Radicals vith Sulfur
Original
Periodical: Zh. obah,-.h,, khimii, 1955., 250 No 7s 1387-11A
Abstractt A study of the reactims of me-thyl,, ethyl,
isoprcqiyl. eal allyl free
radicala wLth S and polyoulfides. As a source of free
radicals use
was made of' alkyl pbenyltriazenes and azobenzene (mechw3ism
of reac-
tion, see vo=unlcation 3:E,, Referst Zhur - Xb1mlys., 1955,
4000g)-
As solvent was c7wsen :Lsopropylbenzone (I) in ordeir to
evaluate the
cmpeting reactions of free radicals vith 9 anct with the
solvent.
A solutic'LD Of 3.2 mol t triam-e and S (6-8 mol per 1 mol
triazene)
in I was heated al. 1.12') until evolution of gas cesseol. It
is shown
Card 1/3

USSR/Organic Chemistry - Theoreticea and General Questions
on Organic Chemistry,
E-1
Abet Journal: Referat Zhur - Khlmiya, No 19., 1956, 61379
Abstract: that free radicals axo almost completely taken up
by S with the
formation of alIcyl polysulf idea vhich are tho primary
prMucts of
the reaction anti do not depend on the presente of
by-producto of
the reaction, nicely enines, in the reaction medium. The
above-
stated radicals ditfer greatly by their activity in the
react-ion
of removal of H frim 1: and differ but little in the
rimction vith
S due to the lmvr energy of activation of this reactico. On
reac-
tion of allyl radical with 3 are formed dialLylpo-Lysulf
ides with a
low yield which -is e)~plained b the instability of these
products.
D
On interacilion cf vadbenzyl L&CY vith S (1;13.7) H2S Is
formed
with a yie:A of B1-8Z4 and benzaldazine (II), yie"Id 51%.
For-ma-
tion of HpS and 11 is -the result of czcidation of
azabenzyl by S.
The author assumes thtit such reactions of
dehydroE;enatI-Dn are also
possible irt rubbers cmitaining diallyl groupings. It is
shown
that on Iftetion of methyl radical vith 3 in the presenz*e
of mer-
captans (or H2S) there takes place removal of krdrogen
1'rom mer-
captan (or H23) -.rith formation of hydrocarbons and the
radicals RS
(or SH). Studied is the reaction of methyl radical vith
Card 2/3

USO/Organic Chemistry - Theoretimi and General Questions on
Organic Chemistry,
9-1
Abet Journal: Referat Zbur - 1(himi,.nij No 19, 1956, 61379
Abstract: polysulfides (dilauryltatreaulf Ide and
dibenzy1tetrasu:U'ide) . which
confirmed the fact the-t the polynulficLes formed in the
course of
the reaction recet vlAb free radIcala. the same no
elemental S. It
is shown an the example of dimethylpo3Vulfide using 335
that under
these conditions are fdrue& molecules of
dimetby~polyo-ulfide con-
taining on the average 6 atoms of sulfur.
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-USSR/Chemistry *f Ifigh Molecular Sub-stances.
Abs Jour: Ref Zhur - 10iimlyal No. 81 1957, 27064.
Author Brosler S Yo. D Igoploak, B.A.,
Inst Kroll' , ~. A:, Pre-n-IN1 I, b.1a.
Title Reactions of Pres Radicals in Solutions. V.
Destruction of Pol3mer Molecules under Influmce
of Free Radicals.
Orig Pub: Zh. cpbshch. khliaiiq 19%, 26, No. 8, 2201 -
2209.
Abstract: The rivactlenei ef free radicals (forming in the
r*su].-t of dissociation of alkylpenyltriazdines
and of dinitryl of aziisobutyric acid) with.
natural rubber, synthetic polyisoprene and. di-
vinyl. polymer wert studied in a wide range, of'
concentrations. The reactions of these pz%lyrz,ers
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USM/Physical C~emiotry' i e Ics'.,Com ustion,.Explosions, B-9
Topochemistry, Catalysis.
Abs Jour : Referat Zhur - Khi.miya, No 1, 1958, 440
Author : B.A. DolEpplosk, Ye.N. Kropocheva.
Inst : '-- - -
Title Oxidatior..-Reducticn Systems for Initiating Radir!al
Proces-
ses. III. Application of Reduction Reaction of Metal
Oxide Salts by Hydrocarbons to Initiate Polymerization
Process.
Orig Pub Zh. obsbeh. kbimii, 1956, 26, No 11, 2980_,~_-984
Abstract Naphthenate of Fe .2.4. is formine at the heating of
Fe3" naph-
thenate (1) solutions in a series of hydrocarbonv. (benzene,
n-amylene, isoamilene., cyclahexene, pentadiene-1,4,-isopre-
ne, isoprene dimer) at 1500 and in absence of 02 in the
system. Isoprene pol,.merizes at 1000 in presence of I;
the polymerization speed rises with the concentration in-
crease of 1, and the molecular wei,,At of the polymers
Card 1/2

USSIJ/Physical Chemistry - Kinetics, Comb~wtion,
Explosions, B-9
Topochemistry, Catal;Vsis.
Abs Jour Ref Zhur - Khimiya, No 1, 1958, 440
drops; the content of 1-2 and 3-4 links in the polymer
(5 to 6%) and the vitrification temperature (-66.40)
cor-
respond to specime,ru; obtained at the radi::al
polymeriza-
tion. The naphthen3te of Cr-3+ behaves similarly to I,
but the polymerizaticn speed is lower in its presence.
Heating of a 2%-ua:L polyisoprene solution in benzene
at
1500 in presence of I results in polymer construction.
The mechanism of foimation of free radicals consists
in
tearing the a -methylene If atom off from the
hydrocar-
bon, reduction of j,e3+ to Fe2+ and libera-.ion of
-the naph-
thenic acid.
See part II in R&Iihim, 1957, 69062.
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