We have studied hierarchic structure of water-soluble and biocompatible
PVA gels using wide-angel, small-angle and ultra-small-angle neutron scattering
and light scattering in a wide Q range from 10^-4 to 10 A^-1. It
revealed structure due to phase separation in micrometer order, network
structure in nm scale and structure of cross-linking points in A order.
Appearance of PVA gels prepared in DMSO/water (60/4) at various temperatures.
Macromolecules, 27, 5609-5615 (1994)
Macromolecules, 28, 3168-3174 (1995)
Supramoelcular Science, 5, 215-221 (1998)
Macromolecules, 32, 7815-7819 (1999)
Phys. Rev. E, 61, 2125-2128 (2000)
I(Q) of PVA gel determined by WANS, SANS, USANS and LS over 5 decades,
and schematic sketch of hierarchic structure of PVA gel.