Analisa Perbandingan Nilai PRI Darfi Produk Sir 20 dan Sir 3 untuk Temperatur yang Berbeda-Beda

Abstract

Plastisity Retention Index ( PRI ) was the measurement of rubber endurance of the heating (oxidation) in the high temperature. The PRI value was measured from the pliancy size of still backward raw rubber if the sample of this rubber was heated while 30 minutes in the temperature of 1400 C. Plastisitas were the comparison between the value of the plasticity after the heating towards the value of the plasticity of early before the heating. This grating was done with the implement wallace plastimeter where being used by the temperature variation that differed that is in the temperature 1350 C, 140 0 C and 1450 C.Variasi this temperature was carried out to know rubber endurance of the high temperature so as to be able to be known by what temperature that was appropriate to use.from results of the trial that was carried out were received that temperature that was appropriate was used was in the temperature 1400 C that is 78 % and in accordance with the SNI standard.