Abstract
Results are presented on: (a) the nonisothermal degradation of nitrile-butadiene rubber (NBR) from TG, DTG and DTA data; (b) the accelerated isothermal thermal degradation of NBR at 80°, 90° and 105° from the change in weight versus time data; (c) the accelerated isothermal thermal degradation of NBR at 80°, 90° and 105° from the change in relative elongation at break with time.
The thermal analysis data showed that the following processes occur successively during the nonisothermal heating of NBR in air: (1) the volatilization of the plasticizer and other ingredients; (2) the exothermic absorption of oxygen to yield nonvolatile oxidation products; (3) the decomposition of these products or their further interaction with oxygen to form volatile products.
The results obtained from the three kinds of measurements were correlated to give a realistic picture of the processes responsible for the changes in the mechanical properties of the material as a consequence of its heating.
Zusammenfassung
Es werden Ergebnisse über (a) den nichtisothermen Abbau von Nitril-Butadiengummi (NBR) anhand von TG-, DTG- und DTA-Daten; (b) den beschleunigten isothermen thermischen Abbau von NBR bei 80°C, 90°C und 105°C anhand von TG-Daten; (c) den beschleunigten isothermen thermischen Abbau von NBR bei 80°C, 90°C und 105°C aus der Abhängigkeit der relativen Elongation von der Zeit.
Die Daten der Thermoanalyse zeigten, daß beim nichtisothermen Erhitzen von NBR in Luft nacheinander folgende Prozesse ablaufen: (1) das Entweichen von Weichmacher und anderen Zusätzen; (2) die exotherme Absorption von Sauerstoff an den erhaltenen nichtflüchtigen Oxidationsprodukten; (3) die Zersetzung dieser Produkte oder ihre weitere Wechselwirkung mit Sauerstoff zur Bildung flüchtiger Produkte.
Die aus den dreierlei Messungen erhaltenen Ergebnisse wurden korreliert, um ein reales Bild über jene Prozesse zu geben, die als Folge des Erhitzens für die Veränderung der mechanischen Eigenschaften der Materialien verantwortlich sind.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
IEEE 101/1972 — Guide for the Statistical Analysis of Thermal Life Test Data.
S. L. Madorsky, “Thermal Degradation of Organic Polymers” Intersci. Publ., New York 1964.
O. Vogl, I. Ivan Sung, H. C. Miller and H. W. Williams, J. Macromol. Sci., A-2 (1968) 175.
V. V. Korshak, S. V. Viragradova, G. V. Danilov, L. A. Beribze and S. N. Salazkin, Visokomol. Soedin, 12 (1970) 129.
A. A. Berlin, B. G. Gherasimov and A. A. Ivanov, J. Polym. Sci., C-41 (1973) 183.
T. J. Gademer, J. Macromol. Sci., A-815 (1974) 105.
S. Ciutacu, D. Fatu and E. Segal, Thermochim. Acta, 131 (1988) 279.
J. H. Flynn and L. A. Wall, J. Res. Natl. Bur. Standards — A Physics and Chemistry, 70 A (1966 487.
D. Fatu, G. Geambasu, E. Segal, P. Budrugeac and S. Ciutacu, Thermochim. Acta, 149 (1989) 181.
E. Segal, P. Budrugeac and S. Ciutacu, Thermochim. Acta, 164 (1990) 171.
E. Karamazsin, P. Satre, R. Borhoumi, G. Lptay and L. Liegethy, J. Thermal Anal., 29 (1984) 259.
E. Segal, P. Budrugeac, S. Ciutacu, G. Mares, Thermochim. Acta, 164 (1990) 161.
D. J. Toop, IEEE Trans. Electrical Insulation, EI-7 (1972) 25.
D. J. Toop, IEEE Trans. Electrical Insulation, EI-7 (1972) 32.
L. Slusarski, J. Thermal Anal., 29 (1984) 905.
L. Slusarski and G. Ianowska, J. Thermal Anal., 29 (1984) 95.
A. W. Coats and J. P. Redfern, Nature, 26 (1964) 68.
E. Urbanovici and E. Segal, Thermochim. Acta, 80 (1984) 379.
J. H. Flynn and L. M. Wall, Polim. Lett. 4 (1966) 323.
C. D. Doyle, J. Appl. Polym. Sci., 24 (1962) 639.
T. W. Dakin, Electo-Technology, 66 (1960) 123.
T. W. Dakin, Transactions AIEE, 67 (1984) 113.
S. Ciutacu, P. Budrugeac and G. Mares, I. Boconcios, Polym. Degrad, Stabil., 29 (1990) 321.
S. Ciutacu, P. Budrugeac and I. Niculae, Polym. Degrad. Stabil., in print.
W. Nelson, IEEE Trans. Electrical Insulation, EI-6 (1971) 165.
R. R. Dixon IEEE Trans. Electrical Insulation, EI-15 (1980) 331.
Author information
Authors and Affiliations
Additional information
Dedicated to Professor Dr. H. J. Seifert on the occasion of his 60th birthday
Rights and permissions
About this article
Cite this article
Budrugeac, P., Segal, E. & Ciutacu, S. Thermooxidative degradation of nitrile-butadiene rubber. Journal of Thermal Analysis 37, 1179–1191 (1991). https://doi.org/10.1007/BF01913853
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01913853