SCIENTIFIC ABSTRACT V.V. CHERNAYA - V.V. CHERNAYA

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000308510003-1
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 12, 2000
• Sequence Number: 3
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

89060 -
S/138/60/000/010/002/008
Thermo-Sensitization of Natural and Synthetic Latexes A051/AO29
uniform raw gel on the molds at a temperature from 60 to 800C. It is pointed
out that the salts mentioned have a tixotropic effect, which is a big disadvan-
tage when used as thermosensitizing agents. Figure 6 shows that the optimum tem-
perature of the mold in the mixture is 700C, so that with a holding time of 60
sea the thickness of the vulcanized film,is o.8 mm. The method for producing
thermosensitized mixtures by introducing a coagulant into a protected latex was
also investigated based on Reference 12 and the possibility of obtaining thermo-
sensitizing mixtures with OP-10 on the LA latex and a few batches of experir4en-
tal SKS-30 latex was shown. There are 7 graphs and 12 references: 2 Soviet, 7
English, 2 French and 1 German.
ASSOCIATION: Nauchno-issledovatel'skiy institut rezinovoy i latekanykh izdeliy
(Scientific-Research Institute of Rubber and Latex Products)
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S/727
,/61/000/000/005/009
1031/1242
A I IT I I 01DIS: Znamenskiy, Cherna7a, V.V., Novikov, V.I.
TITLE: Effect of ultrasonic waves on the properties of chloro-
prene Intex
SOURCE: Sintez lateksov i i1ch primeneniyee-Ede by A.V. Lebedev,.
A.B. Pev,zner, and N.A. Fermors Leningrad, Goskhimizdat,,
1961'. 163-169
TEXT Long-chain undergo structural changes as a result of
the dispersing effect of ultrasonic waves.. The effect of ultrasonic
waves on a colloidal solution and on the ppl7mer contained in it was
studied. Particular attention was given to the OC - and la,- poly-
mers in a chloroprene latex. Specimens containing 46o3% of pol*vmer
were exposed to ultrr onlo waves of 22 and 300 Ices It was found
-that a 90 min exposure proAuces an insignificant effect on viscosi-
ty, stnrting point of coagulation, pH of solution, and solubility of
the rubber in dichloroothane. The extent of adsorption of emulgator
on particle surface ts diminished so that the mean diameter of par-
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S/727/61/000/000/005/009
1031[1242
Eff ec tof ultrasonic wavea.;-
ticles decreases. This phenomenon indicates the dispersing effect
of ultrnsonic action nn latex particles. A destructive effect of
ultrasonic waves on an od-tiolymer dissolved~in dichloroethane was
observed, a6conpanied by a reduction in the 'viscosity, of the solut-
ion. The At -polymer, with a high1v stable structure is affected to
a slight extent. 0n1? 7.76~'~ dissolves in dichlorethane upon a 6 hrS
1.)
exposure to 300 ko ultrn3onic waves* There are 2 figures and 5
tables.
ASSOCIATION: NIIR
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NRs AT601.3:L79 t /i ) SOURCE CODE.- UR/0000/61/000/000/0145/0165
AUTHORSi Znamenskiy, N, N,j Splivanov, 0, A,; Fqmina, L. S.; Chornaya, V. V.
ORG: none '13 -t-1
TITLE: Some investigations of the a ication of ultrasound in industrial process-
ing of resin
SOURCE: Moscow. Oblastnoy podagogichookiy institut. Primenoniye ul'traakustiki k
issledovaniyu vesficEestva, no, 14, 1961p
TOPIC TAGS; ultrasound, emulsion, chloroprona, natural rubber, polymer degradation,
elastic oscillation, ultrasonic wave propagation
ABSTRACT: Application of ultrasound in production control was investigated along
the following lines: propagation velocity of ultrasonic waves as a function of the(,
composition and method of processing rosins; effect of ultr ound on natural rubberV
in benzene r,
,, chloroprene in dichloroothane, and chloropren jUatex; application of
ultrasound to intensify production of aqueous emulsions of plasticizers and to
finely disperse ingredients of latex mixtures. A definite relationship was found
between the propagation of elastic vibrations and the properties and compositions
of rubbers and resins. Natural rubber in benzene solution is degraded when treated
with ultrasound from 22 to 1000 kHz, the process depending upon the ultrasound inten.
sity, as shown in Fig. 1, Ultrasound also degrades 0 w2;
h(w) = K(W + W2) e_iWtO (2)
W2 - W1
for - w2 -