Kinetics of thermal degradation and thermo-oxidative degradation of conductive styrene-butadiene rubber-carbon black composites
- 320 Downloads
The kinetics of the thermal degradation and thermo-oxidative degradation of conductive styrene-butadiene rubber (SBR)-carbon black composites were investigated using thermogravimetric analysis both in nitrogen and oxygen atmospheres. Experiments were carried out at heating rates of 5, 10, 15 and 20 °C/min in both the atmospheres. Friedman method, Kissinger method, Flynn–Wall–Ozawa method and Coats–Redfern method have been used to determine the activation energies of degradation. The invariant kinetic parameters using the IKP method were also determined. The results showed that the thermal stability of the composites in pure nitrogen is higher than that in air atmosphere and the increase in filler loading was found to increase the thermal stability in nitrogen atmosphere. The probable degradation mechanisms of the polymer in both the atmospheres were evaluated based on Fourier Transform Infra Red Spectroscopy (FT-IR) studies.
KeywordsCarbon Black Oxygen Atmosphere Isoconversional Method Filler Loading Redfern Method
The authors thank the Indian Space Research Organization (ISRO), Bangalore for financial support of this work.
- 1.Gupta RK (1988) Fibre reinforcements for composites materials. Elsevier, Amsterdam chap. 2Google Scholar
- 2.Meyers MA (1985) Frontiers in materials technologies. Elsevier, Amsterdam, chap. 1Google Scholar
- 4.Kakizawa K (1986) Int Polym Sci Technol 13(2):40Google Scholar
- 7.Cheon OS, Pyeong LH, Taik KH, Ok YK (1999) J Chem Eng 16(4):543Google Scholar
- 8.Li KW, Deuk KS, Bum LS, Kwon HI (2000) J Ind Eng Chem (Seoul) 6(5):348Google Scholar
- 20.Lesnikovich AI, Levchik SV (1985) J Thermal Analysis 30:667Google Scholar
- 22.Donnet JB, Wong MJ (eds) (1993) Carbon black science & technology, 2nd edn. Marcel Dekker Inc., NY, Chap 9, p 295Google Scholar
- 25.CR Acad Sco, Ser C 266:678 (1968)Google Scholar