Bakošová, Daniela

Hrehuš, Rudolf

Kopal, Ivan

Koštial, Pavol

Ružiak, Ivan

Šišáková, Jana

English

DSpace at VSB Technical University of Ostrava

['._I I !'J L I ts Sborník vědeckých prací Vysoké školy báňské - Technické univerzity Ostrava číslo 3, rok 2009, ročník LII, řada hutnická, článek č. 1544 Pavol KOŠTIAL 1, Ivan KOPAL 2, Ivan RUŽIAK2, Jana ŠIŠÁKOVÁ2, Ru<lolfHREHUŠ2, Dana BAKOŠOV Á2 THERMAL PROP_ERTIES OF RUBBER BLENDS FILLED BY SILICA-CARBON BLACK COMBINED FILLERS TEPELNÉ VLASTNOST! GUMÁRESNKÝCH ZMESÍ PLNENÝCH ZMESOU SILIKY A SADZÍ Faculty o/ Metallurgy and Materials Engineering, 17. listopadu 15/2172; Ostrava-Poruba; Czech Republic, paveLkostial@vsb.cz Faculty o/ Jndustrial Technologies, I. Krasku 491/30; Púchov, Slovakia Abstract ln the paper we present the measurements of therma:l conductivity, diffusivity and specific heat capacity by a flash method for ruober compounds with different ratio of silica - carbon black fillers. From the presented results it is possible to see that proper filler mix.ture (silica - carbon black) in a blend offers the rising of all thermal parameters, it lowers the electrical resistance. All trends are favourable to the improvement of useful properties of the blend. Abstrakt V článku je prezentované bezkontaktné meranie tepelných parametrov, tepelnej vodivosti, divuzivity a špecifickej tepelnej kapacity pomocou flash metódy s roznym pomerom plniva siliky -sadzí. Z nameraných výsledkov je možné vidiet', že zmes (so silikou a sadzami) sposobuje zvýšenie všetkých tepelných vlastností, ako aj zníženie elektrického odporu. Všetky trendy sú priaznivými ku zlepšeniu úžitkových vlastností zmesi. Key words: mixture, carbon black, silica, capacity, conductivity 1. IntroductionThermal properties of rubber blends play an important role in the computer modelling as wellas the construction of modem tyres. To understand the dynamical properties of a tyre as a whole, it is necessary to know also the dynamic mechanical properties of various rubber.compounds present in the tyre. The use of reinforcing fillers gives the material unique properties, a combination of high elasticity with high strength. The addition of the filler to the polymer increases both moduli G and E according to a hydrodynamic effect. The filler polymer effects are determined by the structure of the filler. Polymer chains are trapped in the voids of filler agglomerates and agglomerates. They are immobilized and shielded from any deformation. They not contribute to the elastic deformation. Occlude rubber increases the effective filler loading and thus the strain independent contribution to the modulus [l , 2]. Blending of fillers with rubber leads also to a nonlinear phenomenon characterized, for instance, by Payne's effect caused by a filler-filler interaction. This effect is largely reversible once the strain is released and it is independent of the type of a polymer, but it depends on the type of a filler. 109 

Tepelné vlastnosti gumárenských zmesí plnených zmesou siliky a sadzí

http://dspace.vsb.cz/bitstream/10084/78132/2/VSB%20HUF%202009-3_22_Kostial.pdf

Tepelné vlastnosti gumárenských zmesí plnených zmesou siliky a sadzí

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