ABNORMAL SCATTERING OF POLYMER IN BINARY SOLVENT

The behavior of a high molecular weight polymer (polyethylene-oxide, P EG) in a binary liquid mixture (nitroethane/3-methyl-pentane, NE/MP) i s studied at the one-phase temperature of NE/MP by static and dynamic light scattering methods. We found that the scattering intensity incre ased abruptly near the critical composition of NE/MP although the samp le was very far from the critical temperature of NE/MP. Explanations i n terms of critical opalescence and wetting layer inversion are discus sed. (C) 1998 Elsevier Science B.V. All rights reserved.