SCIENTIFIC ABSTRACT NIKOLSKIY, V. G. - NIKOLSKIY, V. N.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001137220003-2
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: August 1, 2000
• Sequence Number: 3
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

5/020 61MQW030/054
2144 Al"
9
Subts, X. Y&.
TIUSt Plastification of polyethylene in low-tesperaturo radiolysis
PERIODICALs Aksdmiya nauk SSSR. Doklady, v. '141, no. 6, 1962, 1406-"
TEXTe The temperature effect oa the atructural change@ In Irradiated
polyethylene was evaluated from the luminescence curve recorded with a
photasultiplier. 11ghopressurs polyethylene was irradiated at 770K with
fast electrons (I - 70 Krad) and then heated at a rate of 200C/Mift to
300OKo It was fowA that Increasing the irradiation doe* shifted the'
maximum of luminescence toward lower t4sperat.ureas Tmax 9 designating
also the vitrification point of polyethylinev was reduced bY P44eC whom
the does was raised from I to 70 Krad. When Itiadiation with 20*Krad was
repeated using the some doe* under otherwise equal canditionag T shiftd
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slightly toward hl4ftor temperatures owing to oroGallaking induced by the
first Irradiation (Tysokoaalsk. eoyed., 4, no. 6 (1962)). TS" shifted
toward lower temperatures Lf:tho second done was higher than the first*
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S/020J62/147/006/030/034
Plastification of polyethylene in ... B144/BI86
These phenomena are due to plastification of the Vollmor by molecular
hydrogvn and light hydrocarbohe which are produ6ed In the radiolysts, but
cannot diffuse at 770K- Th4 'interdependence of diffuAi*n rate and heating
rate was proved ty heating 604 thick polyethylene samples, irradiated with
0-5 and 4 Kradq at different rates. Whersais, at a heating rate of 40 &
50OC/sin, the dovitrification,tomperaturs, of the samples Irradiated with
4 Urad was 4 -60C lower than that of the 0-5 Krad samples, no difference
Was observed with a heating rate of 5*C/mIn- Thus with slow heating the_
p1satifying radiolytic products were diffused beroro the vitrification
point was reached. 72hus crosslinking leads to a higher vitrification
pinto while plastification Increases the molecular mobility and re4uces
the vitrification teoyerature. There are 2 figures.
ASSOCIATIONo Institut khimichaskoy fiziki'Akadeali nauk 35SR (Institute
of Chemical Physics of the Academy or Sciences USSR)
PRESEXTEDe imly Igo 1962, by V. N. KandrWyev, Academician
SUBMITTEDs July 16# 1962
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~Accmww'n.- )"00W5 S/0062/63/=/005/0954/0954
AUTIPAt Sikol'Wdy, -Q,;Chkhd4%e,LL;Duben,,N-Ta-
TIM11 Rwtion of allql radicals with oxygen in solid phase
SWPjXt AN SSSP. Isrestiy*- Otdelwdys khimichoslkikh nauk# no. 5, 1963, 954
TOPICt, TAG3: Z?Pv-spectrap polyethylene,, natural rubber, dicyclohWl-4-docans
:ABS7RA'V'T: The authors ntudial -the EPR "tra of umplas of polyethylene, natural
rubber, cLicyclohexyl-4-docane, and eame other =orphous organic cQmpovnds which
wore irrailiatod by fast electrons at 77K. ~Ian the tempirrAture of the irradiated
=~Lv vao raised# a formation of paroxIde-typo radicale was observed, which was due
41-
vo wre re,~ctivn of the &I)ql radicals vitb the oxygen whicb was dissolved in tho
wubst;;acei. 1-i particular, in the case of tha s=pian which ware vitrified in air
prior W irradiation,, the stabilizod alkyl radicals were oxidizod completely if
the-4r toncenatration did not exceed 2 x 10 sup 17 to 1 x 10 sup 18 & sup -1. It
was noted for all the compounds studied that the oxidation rate of the radic&ls
shar'OLy inicresses In the twpsrature interval from 80 to 50 degrees below tae
y4trifica:Uon point. In the c4se of dicycloh=yl-4-dezane (vitrification point
Cord

A
.10MUCK 11HI AP30OW5
-195K),, th,* oxidatLon rate of the raclicals ris-as almort 1000 times when the tem-
-eratt;--a in changed from 120 to 1.40K, Daring oxidation, the vz=ary Cancentr'%tion
of this radicils in the rAmples undorgoes rA assantial change. Rapid oxidation of
the reacals during the hoating of irrWated ample* of polTethylene begins
Orm A Ma
. _v-tranaltion ttaporaturo,, 150 to 155 K (releAsl I the bility of tho sag-
nrnts - (')l nub 2 -), During the heatIng of hydrocarbono whirh had bom irradia-
tcd in tho cryst.41-ino &tate.. ~Ln analogouc ox1dation of the radicp-la did not occur
down to nelting temperature. D'As is apparently associated with Ue fact Ulat the
equialbi-lual. concentration of o~qgan in tha cryaWline phase io auch !war "n in
~the aviotIftuo atate.
A5=1'JL117W-. tnsUtut khimichoskoy fisiki Akadeau rwilt &W (Institute of Chdai-
,cal Physics4 AcadoW of Sciencov SSSR)
smnirns 22jau63 DATE ACQi 124VA63 ~rz=: 00
S"a Cout -'0" 000 OTMs 000
IPH NO W MV s
Cold

ACCESSION KA: AT4020701 S/0000/63/000/000/0100/0106
AUTHOR: Bellgovskly, 1. M.; Kravchuk, 1. P.; Nikol'skly, V. G.; Yanikolopyan,
N. S.
TITLE: Low-temperature radiation-induced polymerization of isobutylene
SOURCE: Karbotsepny*ye vy*sok*T41okuly4rny*ye soyadln4nlya (Carbon-chain macro-
molecular compounds); sbornlk statoy. Moscow, ltd-vo, AN SSSA, 1963, 100-106
q
TOPIC TAGS: polymerization. radiation polymerization. Isobutylene. low-temperature
polymerization
ABSTRACT: In order to clarify the degree to which 'the reaction proceeds via an
Ionic mechanism, the kinetics of the radiation polymerization of lsobutylene over
a temperature range of -40 to -196C were Investigated. With respect to low-
teaioersture radiation polymerization. the following conclusions could be drawn:
The independence of the polymerization yield of the Intensity of the dose Indl-
cates a linear relationship between the polymerization rate and the radiation in-
tensity. The polymerization of Isobutylene In the liquid phase Is accelerated by
a decrease In temperature down to the freezing point of the monomer. The reaction
rate has an activation energy of 2.5 keel/mol. In the solid phase, the reaction
rate has a normal temperature d4p4ndence with an apparent activation energy of
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ACCESSION NA: AT4020101
+1.88 kcal/mol. The maximum rate of polymerization is obtained In the Initial
stage of Irradiation and the process shows a tendency to become saturated as the
dose of radiation Is Increased. The molecular weight of the product has a maxl-
i mum value during the Initial stage of Irradiation. after which It drops rapidly
to a value of 15.000-20,000; thereafter It Is essentially Independent of the dose.
Orig. art. has: 5 fornAlas and 5 figures.
ASSOCIATION: Institut khlmicheskoy fiziki AN SSSR (institute of Chemical Physics,
AN SSSR)
SUBMITTED: 26Apr62 DATE*ACQ: 208ar64' EXCL: 00
SUB, CODE: OC NO REF-SOV: 005 OTHI.A: 005
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kciluST09 Us AMODOU6 S/0062/63/0w/005/0955/0955
AUTI-Mt Nikollskiy.. Vo G.; Alfimov, X. V.; DU4W# N. Ya.
MIX: The nature of radio-therwl=Lnescence of organic compounds
SOME.- PJ1 3=. Isvestiya. Otdelenlye khimiCh3.0kJJCh nSUk, no- 30 1963, 955
TOPIC TAM radialysim, radio-ther-molimine at onto, hmmrj, nonano, bonLinel poly-
otu-hylenaj, alkyl, radicals, arm-W-- free radicala
AESIMT: When organic oubstances are heated, a glaw is very often observed after
r4AW4As. Mis "vociated with the reowcbi;rm-
tion of icre which were stabilized in the imbstanco during radlolyAn (ftrmell,
J, It., Vaming, B.; Journ, Chen. Phys. 23, IJ68, 1955),, or with the retombination
o1' otabilined radicals (Kustaxtovich, 1. M.., Polak, I- S., Fqtova, N. M.; Proceed-
Dip ot ZrA, All-Union 0onferance, on Radio Chanistry. Moacov. ltd. AN, 51,10R#
1~1612# jov 322)*
-: . Smples of saturated wid aromatic hydrocarbons (hexane, nonans,, bend
tiftip tind others) whlch wt" irradiated by fast electrons at 77K were studied. It
-was foimd Lhat all of thor4 oubstames luminesce if they are excited by v1sible
litit 'At 77K ifter radiolvsi3. Dur1rS a prolonged exposure, the intensity of the
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phatoluedneseettee gradually dr*ps can be red-a-ced by appramizately 100 times.
7ho test, unples than whiten wid the calor acquired durIng radiolysis disapptars.
Dvit4g oubseqjent thavIM, the whitened test emples Wre a glwm which is many
t1ma witaker tbin that of ax&plea which ware not subjected to light. It was rhown
thAtt tho concentration of ruitcale in the e=ple (according to EPR data) during
ex;*tniro done not oub5tarMAL31y change. Test s=plas oe pol7ettql&ne, subjected t4o
mc