SCIENTIFIC ABSTRACT KRASOVSKAYA, T. A. - KRASOVSKIY, A. YA.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000826210013-8
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: July 31, 2000
• Sequence Number: 13
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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ACC NR, AP7006909 sOURCE CODE: I
1.
AUTHOR: Koroleva, T.V.; Raskin, Yu.Ye.; Kraeovskaya, T.A.;
Sobolevskiy, M.V.; Gornets, L.V.
ORG: none
-,ITLE: Lubricating properties of polymethyl (chlorophenyl) siloxanis
SOURCE: Plasticheskiye massy, no. 2, 1967, 41-43
ITOPIC TAGS: lubricant, silicone lubricant, lubricity,
P4 15- one 6 hIP " a h 1
i-ABSTRACT:
'A study was made of the effect on the lubricity of polymethyl(chlorophenyl)-
siloxanes of 1) the-methyl/phenyl group ratio in the middle and at the
end of the backbone, and 2).the chlorophenyl group distribution along
the backbone. The lubricity was tested in a four-ball apparatus; the
criteria used were the diameter of the wear spot on the lover balls, the
~frictibn coefficient at various loads, andthe character and magnitude of
the friction force. The effect of the methyl/phenyl group ratio was
studied for the following polydisperse mixtures:
Card 1/ 4 UDC; 678,84.ol:62i.891.22

ACC NRs AP7006909
Polysiloxanes I
(ai.).-S11OSiCHCH,jOSi(CH,). (1)
(CH3)3Si[OSi(CH:)2l.(OSICH3CH,IOSI(CI43)3 (2
(CHS)rSilOSICH&CgH61310SICHCHClIOSi(CH,), (3)
(CHs)3Sl[OSl(Cli3)ll,IOSICHCitl,CIIOSI(CHs), (4)
(CH.).SIIOSICti.C.H.J.,IOSICHCH,,CI,IOSI(Cti3b (5)
(Clis)*SIIOSI(Ctis)%)a(OSiCH3CHCIS'IOSI(CHS)3 (6)
Polysiloxanes II
(CH3)3SI10SI(CH3)21,[OSICH3CH,CIIOSi(CH,), (1):
(CHj)&CsHISIIOSI(CHs),],(OSICHCH,CllOSlc4H&(CH3~- (2)
I.CHs(C4H&)sSiIOSI(CHs)sjjoSiCHjCgH4CIllOSI(qHs)stH, (3)
It was found for polysiloxanes 1, that at a constant number of trimethyl-
siloxane and groups per molecule, an increase in the methyl/phenyl ratio
'improves lubricity. For polysiloxanes II, it was fou d that the replace-
-ment of methyl....end gro~up!! ~y.phenyk end.groups has aV_adverse effect on
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lubricity. It was concluded that an increase in the number of phenyl
groups in the'middle and at the end of the chain has an adverse effect on
.the lubricity of polymethyl(chlorophenyl)siloxanes. Therefore, a determina-
tion of the effect of the distribution of chlorophenyl radicals along the
backbone on lubricity required a comparison of oligomers having not only
the same chlorine content but also the same.numbeii of methyl and phenyl
radicals.' The e&~'c't of the chlorophenyl radical distribution on lubricity
.-was studied.-:f9F.polysiloxanes III:
-S1COH,C1(CHA (1)
C -1, C"'
(Cj1,),C,14,S1O-~ -~11-0-_ -1 -W-0- I-SICOHO(CHI), .(2)-
~H3CI, I
CH, -1_1-_SCH,
PI) CiNXI.S10- SI-0- 1_0_ -SIL~H;CIACH,),
J3
C.
Card

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Comparison of III-1 with 11-2 showed that the transfers of a chlorophenyl
radical from the middle to the end of the chain substantially decreases the
wear spot but does not change the friction coefficient. Comparison of
.111-!2 and 111-3 shavred *that the position of dichloropherql radicals has
virtually no effect on-lubricity. Evidently, for such a chain length
(6 units) the.presence Pf two dichlorophenyl radicals ensures virtually the-
same lubricit
. . . . y~.r~e~p~less of their pos-ition. art... has: 5
M
figures.
SUB CODE: l1/ SUBM bATtf *none/ ORIG REF: 001'/'-OTH REF: oo6/
ATD-PRESS: 5116
Card 4/4

YEREMEYEV, G.G.;_WSQV$KAYA, T.K.
Determination of annual temperature gradient for the design
of structural elements for climatic influence. Inzh.-fiz.
zhur. 8 no.2:190-197 F 165. (MIRA 18:5)
1. Inotitut stroitellnoy Miki, 14oBkva.

KRASOVSKAYA, T.M.
.. 1. 1-.-
Accounting for asynchronism of the formation of streamflow
in computing the water resources of the Ukraine. Trudy
UkrNIGMI no.5008-85 165. (~UIIA 18:11)

72
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