Extraction studies on the nature of the bonding in filler-reinforced elastomers

✍ Scribed by Ping Xu; James E. Mark

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 477 KB
• Volume: 31
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(95)00092-5

✦ Synopsis

Particles of iron oxide were blended into samples of cu-1,4-polybutadiene and polyisobutylene, and portions of both the unfilled polymers and the resulting polymer-filler mixtures were cured with benzoyl peroxide The filled networks were cloudy, but strips extracted using a toluene-hydrochlonc acid mixture became as clear as the unfilled networks, suggesting effective removal of the filler particles. Miasurements of equilibrium swelling and stress-strain isotherms in elongatton were carried out on the unfilled elastomers, and on the filled ones both before and after extraction, in order to study the nature of the bonding between the filler particles and the polymer chams. There were no slgmficant differences between the degrees of equilibrium swellmg and the stress-strain isotherms of the unfilled networks and the corresponding properties of the previously-filled networks after the filler parhcles had been removed. This suggests that the bonding between the filler particles and the elastomer chains m these systems is primarily physical rather than chemical.