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Vulcanization Kinetic Study of Different Nitrile Rubber (NBR) Compounds
Author(s) -
Gabriel Cléverson F. S.,
Linhares Felipe N.,
de Sousa Ana Maria F.,
Furtado Cristina R. G.,
Peres Augusto C.C.
Publication year - 2014
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201300209
Subject(s) - acrylonitrile , vulcanization , nitrile rubber , natural rubber , nitrile , activation energy , materials science , reaction rate constant , polymer chemistry , cure rate , composite material , chemical engineering , chemistry , organic chemistry , polymer , kinetics , copolymer , medicine , physics , surgery , engineering , quantum mechanics
Summary The vulcanization process of rubber compounds comprises multiple chemical reactions and the investigation of this process can be carried out using several techniques. This paper aims at investigating the influence of acrylonitrile content (28, 33 and 45%) and the presence of a carboxyl group in the vulcanization process of nitrile rubber. A methodology that uses rheometric parameters to determinate the cure rate constant ( k ) and activation energy (E) was conducted. The results showed that there was a decrease in cure rate constant with increasing of acrylonitrile content in the rubber, for a given vulcanization temperature. Furthermore, a higher value of activation energy was obtained for the 33% of acrylonitrile compound.