Effect of Carbon Black and Silica Fillers in Elastomer Blends
2001; American Chemical Society; Volume: 34; Issue: 20 Linguagem: Inglês
10.1021/ma010183p
ISSN1520-5835
AutoresYimin Zhang, Shouren Ge, B. Tang, Tadanori Koga, Miriam Rafailovich, Jonathan Sokolov, Dennis G. Peiffer, Z. Li, Anthony J. Dias, K. O. McElrath, M. Y. Lin, Sushil K. Satija, Stephen G. Urquhart, Harald Ade, D. Nguyen,
Tópico(s)Fiber-reinforced polymer composites
ResumoThe effects of carbon black and pyrogeneous silica fillers on the interfacial properties of a homopolymer [polybutadiene, (PB)] and a terpolymer [brominated poly(isobutylene-co-p-methylstyrene), (BIMS)] are reported. Neutron reflectivity (NR) was used to study the interfacial structure. The results are complemented by scanning transmission X-ray microscopy (STXM) and lateral force microscopy (LFM), which were used to probe the morphology and surface lateral force. Small-angle neutron scattering (SANS) was used to characterize the size and surface properties of the filler aggregates in elastomers. Our results show that the interfacial behavior of PB/BIMS is more sensitive to carbon black than to silica. The interfacial broadening is significantly slowed down with addition of merely φCB = 0.01 (volume fraction) carbon black fillers. This volume level is much lower than that used in bulk rubbers (φCB ≥ 0.1). Pyrogeneous silica has a less pronounced effect on the interfacial characteristics. When both carbon and silica are incorporated into the PB layer, the effect of carbon black is offset by silica fillers.
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