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Free Volume of Montmorillonite/Styrene-Butadiene Rubber Nanocomposites Estimated by Positron Annihilation Lifetime Spectroscopy

✍ Scribed by Yi-Qing Wang; You-Ping Wu; Hui-Feng Zhang; Li-Qun Zhang; Bo Wang; Zhi-Feng Wang

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
158 KB
Volume
25
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: The size and concentration of free‐volume holes of two kinds of montmorillonite (MMT)/styrene‐butadiene rubber (SBR) nanocomposites were investigated by positron annihilation lifetime spectroscopy (PALS). Strong interfacial interaction caused an apparent reduction of the free‐volume fraction of rubber probably by depressing the formation of free‐volume holes in the interfacial region. Interfacial interaction in MMT/SBR nanocomposites was weaker than that in SBR filled with carbon black.

Dependence of normalized o‐Ps intensity of four kinds of composites on filler volume fraction.

imageDependence of normalized o‐Ps intensity of four kinds of composites on filler volume fraction.

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