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Free Volume of Montmorillonite/Styrene‐Butadiene Rubber Nanocomposites Estimated by Positron Annihilation Lifetime Spectroscopy
Author(s) -
Wang YiQing,
Wu YouPing,
Zhang HuiFeng,
Zhang LiQun,
Wang Bo,
Wang ZhiFeng
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400380
Subject(s) - styrene butadiene , montmorillonite , natural rubber , volume fraction , materials science , nanocomposite , composite material , carbon black , volume (thermodynamics) , spectroscopy , positron annihilation , positron annihilation spectroscopy , positron , styrene , polymer chemistry , copolymer , polymer , electron , thermodynamics , physics , quantum mechanics
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.