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Effect of Cyclic Deformations on the Dynamic‐Mechanical Properties of Silica‐Filled Butyl Rubber
Author(s) -
Ward Azza A. M.,
Stoll Bernhard,
von Soden Wolfgang,
Herminghaus Stephan,
Mansour Ashraf Ahmed
Publication year - 2003
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200300135
Subject(s) - materials science , composite material , natural rubber
The effect of the chemical modification of the silica surface by the silane coupling agent (Si69) on both the real and the imaginary parts of the shear compliance ( J′ , J″ ) on silica‐filled butyl rubber vulcanizates was investigated in a wide temperature and frequency range, −70 to 120 °C and 10 −4 to 10 Hz, respectively. In addition, the stress‐strain measurements, DSC, and TEM were carried out. Moreover the effect of stress‐strain cyclic deformation up to ten times with maximum deformation 80% of the elongation at break on J′ , J″ is also studied. It was found that the filler network recovers after cyclic stress‐strain in a time scale of one year at room temperature.Transmission electron photographs of the butyl rubber [IIR] vulcanizates: (a) IIR, unfilled, (b) IIR, filled with 20 phr SiO 2 , (c) IIR,filled with 20 phr SiO 2 + 1.6 phr Si69.