SCIENTIFIC ABSTRACT REYTEROV, V.M. - REYTSKAYA, O.YE.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001444730009-9
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 20, 2000
• Sequence Number: 9
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

I ACC NR: AP(000028
that ocy-en has probably participated in the process. it is pointed o-L;t in partic-alar,
Uhat earlier deductions that blue coloring of fluorite ci-jstals may be produced by
rare-ea 'h
'ions (such as yttrium) may be in error, a-nd that the, oxjgen may be the
cause of the color centers. It is also proposed that, besides bloc]king the rare-eazth
ions and cormpensating their excess charge, the oxygen can also increase independently
the number of defects in the crystal lettice and facilitate the formation of color
centers. The authors thank M. A. Vasil'yeva and V. A. Pis'mennyy for supplying many 1
'
a
.L-the investigated crystals, F. K..,Volynets for interest in the work, and V. A.
Arkhangel'skaya for a discussion of the results. Orig. art. has: figures.
-:-,SUB CODE; 20/ SU13M DATE: ,15Jul65/ ORIG REF: 015/ OTH REF: oo4
Card 2/2

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M. 11. Shf MV G.
Lakirovannaia obtiaz~ka karkasa zhe.~Stkogo dirizhablia. Moskva,
Jlav. i,,-!d. aviats- lit-rY, 1938. lilt P., illus.
Ublio-raphy - p.
Title tr. Dor.,!!d covering of the airframe of a rigid nirship.
TL662.E6R4
SO; Aeronautical Sciences and Aviation in the SoViet Union, Library of
195:;*

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ARMIIGELISKIY. Y.N., RITTLINGIR, S.A.
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SUBJECT USSR PHYSICS CARD 1 2 PA 1690
AUTHOR REJTLINGER,S.A* , MASLE"IKOVA,A,.A., JARCHOW,1.5.
TITLE %he Gas-Penetrability of Polyorganosiloxan Rubber.
PERIODICAL Zurn.techn.fis, fasc.11, ~L60 2553-2557 On56)
Issued: 12 / 1956
Here the dependence of thistype of rubber on composition, an the vulcanizing
method, and on temperature is studied.
,investigation method: Dimethyl polysiloxane (caoutchouc SIT) served as initial,
.polymer. To 100 units of weight of this asoutchoue 3 units of bensoyl peroxide
and 5 units of zinc oxide are added for the purpose of vulcanization. In sons
cases white soot 6r titanium dioxide was introduced as filling material'. The do-
vice for the determination of gas penetrability consisted of 2 steel chambers
between which the plate-shaped samples to be examined were pressed. Before
measuring, both chambers were evacuated to 10-3 mm tovr, after which the
upper chamber was connected with the gas. The gas diffuses through the plate to
be examined into the lower chamber which is connected with a mercury manometer.
Tea t results: The values found for the constant P of gas penetrabilityq for
the diffusion constant D, and for the solubility constant 6 are shown togeth er
in a table. Investigations extended to unfilled vulcanization products.of
dim6thylpolysiloxane and natural caoutchouc. The rubbers examined have a very
,high degree of gas penetrability which by far exceeds that of other molecular
compounds. The increase of the gas penetrability of dimethylpolysiloxane as
agai,nst that of natural caoutchoue is a consequenop of the considerable in-

V
Zurn.techn.fis,26,fase.11, 2553-2557 (1956) cARD 2 2 PA - 1690
crease of the diffusion velocity of gases. Vulcanization in an oven or a
thermostat diminishes gas penetrability considerably, but vulcanization,in a
press entails no considerable modification of gas penetrability. The gas.
penetrability of dimethylpolysiloxanes can be somewhat reduced by the intro-,
duction of filling materials. Active filling materials (white soot) are more
effective than inactive ones (titanium dioxide). With rising temperature the
penetrability for H2' N2 Og increases somewhat, but it diminishes for CO..
From the data obtained also the activation energy of the diffusin and the
heat of solution of nitrogen in the polymer werecomputed.
Discussion of results: In some case the polyorganooiloxaneeLdiffer con-
siderably from the caoutchoucs of the carbon type because of their particular,
molecular structure. The fact that specific weights are relatively low in
spite Lof the presence of heavy Si-molecules is indicative of a loose
packing of the molecules. They probably have a spiral structure. Penetration
of gas occurs by a diffusionlike transfer of the molecularly dissolved as
g
but not by flows of the KNUDSEN or FOISEUILLE type.
INSTITUTION:

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USSR/Physics of High Molecular Sulbstances D-9
Abs Jour : Referat Zhur - Fizika, No 5, 1957, 11547
Author : Reytlenger, S.A., Maslennikova, A.A., Yarkho, I.S.
Inst
Title Gas Permeability of Polyorgganic Siloxane Rubber.
Orig Pub Zh. tekhn. fiziki, 19506, 26, No 11, 2553-2557
Abstract No abstract.
Card 1/1
--------- -

- 8=1
Category USSR/Atomic and Molecular Physics - PhyjIcs of high -moleci'G_qx s4bstancz! D-9
Abe Jour Ref Zhur - Fizika, No 1, 1957,No 992
Author : Bartenev,G.M., Reytlinger, S.A., Rubinshteyn, B.Ye.,
Inst ; Scieatific-Resea._rc~B~_ti~iute of the Rubber industry, Moscow
Title : Permeation to Gas and Vitrification of Polymers.
.Orig Pub Zh. fiz. 4imii, 1956, 30, No 3, 532-536
Abstract The authors indicate that the permeation to gas of a polymer F and the
mobility of its molecaldr rings are determined uniquely by -the diffusion pro-_
perties. Therefore, the stronger the inter-molecular bonds,'tha lower, Pand the
higher the vitrification temperature Tv. Starting with an eq:uatiou for the tem-.~
perature dependence of the diffusion constaft D , and'taking into account that
the activation energy of thepolymer diffusion is greater that Tv and proportion-
al to it, the authors obtained the equation log D -z:: A 4- (BT:v/T), whare A and B
are constants. Assuming P;:~ Dcr , where'a- is the solubility of the gas in,the
polymer, assumed by the authors to be constant for a given gas in all polymrs
aid mWdng many other assmptioa$ they obtained log F