2015 Volume 64 Issue 5 Pages 351-363
The energy transfer between neutron and materials can occur in the scattering process with slow neutron because it possesses an incident energy, which is comparable to thermal energy of materials. That is to say, we can investigate inelastic and quasielastic neutron scattering from materials with slow neutron. There exist various dynamics in a very wide temporal and spatial scale as well as hierarchical structure due to motional degree of freedom for soft matter including polymers. However, the dynamical measurements with neutron has not been actively performed compared to the structural analysis by small angle neutron scattering. It is considered that we have to investigate both structure and dynamics of soft materials in order to understand it's functionality and physical properties adequately.
In this review, we mainly focused on the dynamics of polymer in solid sate covering four topics：(i) low energy excitation in far below glass transition temperature(Tg)；(ii) evaluation of crystalline elastic modulus by phonon dispersion curve；(iii) local relaxation process “fast process”；(iv) the relationship between gas permeability and local dynamics.
