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Surface mobility in monodisperse polystyrene films
Author(s) -
Kajiyama Tisato,
Kawaguchi Daisuke,
Tanaka Keiji
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200351111
Subject(s) - dispersity , polystyrene , materials science , glass transition , polymer , surface (topology) , polymer chemistry , chemical engineering , chemical physics , analytical chemistry (journal) , composite material , chemistry , organic chemistry , geometry , mathematics , engineering
Surface dynamics in monodisperse polystyrene films was examined by lateral force microscopy in conjunction with dynamic secondary ion mass spectroscopy. Glass transition temperature, T g , at the surface was markedly lower than the corresponding bulk T g . Also, it was shown that polymer chains present at the surface could diffuse even at a temperature below the bulk T g . The surface depth, in which molecular motion was activated, was of the order of 5 nm.