Premium
Size Effect of Al 2 O 3 Nanowires on the Molecular Relaxation in Epoxy Composites
Author(s) -
Wan WeiTao,
Yu DeMei,
Huang LongBiao,
Xie YunChuan,
Guo XiuSheng,
Zhang Jing
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800015
Subject(s) - nanocomposite , nanowire , relaxation (psychology) , epoxy , dielectric , materials science , thermal stability , activation energy , molecular dynamics , composite material , absorption (acoustics) , polymer chemistry , chemical engineering , chemistry , nanotechnology , computational chemistry , optoelectronics , engineering , psychology , social psychology
The size effect of Al 2 O 3 nanowires on the molecular relaxation of an epoxy system was investigated by means of DSC and dielectric relaxation spectroscopy. T g and activation energy of dielectric relaxation decreased with the incorporation of the nanowires. To explain the observed results, a coarse‐grained confined‐region structure model is proposed, and on the basis of this model, the change in molecular motion arising from the nanowires could be understood. The variations of thermal stability and water absorption for the nanocomposites were also discussed. These original experimental results should be helpful in scientific research and nanocomposite applications.