Vol.1, No 5, 2000 pp. 81 - 86
UDC 678.4.02
THE ASSESSMENT OF THERMAL STABILITY
OF ELASTOMERIC BLENDS OF NR AND SBR LATEX
BY USING THE IR SPECTROSCOPY
Dragan Milenković1, Ljiljana Rašković2
1Kruševac 37000, Rasinska 32, 2Leskovac, Yugoslavia
Abstract. All known polymeric materials are more or less subject to degradation. A knowledge of stability of polymeric materials is essential for their optimum treatment and application. For this purpose the testing of degradation and stabilization of polymers is an integral part of the science of polymers and polymeric engineering.
The anticipation and following of the process of degradation in pure model polymeric composition is relatively simple, whereas in practice this problem is more complex in polymeric mixtures due to the system complexity.
Elastomeric blends of natural latices (NR) and styrene-butadiene rubber (SBR) rubber served as an example to test the influence of thermo–oxidative destruction on physical and mechanical properties of these blends. In connection with this, chemical changes were identified by using the IR spectroscopy.
Key words:  The latices of natural rubber, the latices of styrene–butadiene rubber, blends, mechanical properties, the IR spectroscopy, thermo-oxidative destruction
OCENA TERMIČKE STABILNOSTI ELASTOMERNIH BLENDI LATEKSA NR I SBR KAUČUKA IR SPEKTROSKOPIJOM
Svi poznati polimerni materijali u većoj ili manjoj meri podložni su destrukciji. Poznavanje stabilnosti polimernih materijala je neophodno za njihovu optimalnu preradu i primenu. Iz tih razloga ispitivanje degradacije i stabilizacije polimera predstavlja integralni deo nauke o polimerima.
Predviđanje i praćenje procesa degradacije kod čistih modelnih polimernih kompozicija je relativno jednostavno, dok je kod polimernih smeša u praksi taj problem daleko složeniji zbog složenosti sistema.
U radu je na primeru elastomernih blendi lateksa prirodnog (NR) i stiren butadienskog (SBR) ispitan uticaj termooksidativne destrukcije na fizičko-mehanička svojstva ovih blendi a IR spektroskopijom identifikovane hemijske promene u vezi s tim.
Ključne reči: lateks prirodnog kaučuka, lateks stiren butadienskog kaučuka, blende, mehanička svojstva, IR spektroskopija, termooksidativna destrukcija