Compound formation and solvent (dis)ordering in syndiotactic polystyrene/benzylmethacrylate systems

In-situ small- and wide-angle X-ray scattering (SAXS and WAXS) experiments combined with Raman spectroscopyhave been performed to study the phase behaviour of syndiotactic polystyrene (sPS) and benzylmethacrylate (BzMA). In the quenched gels, sPS adopts a helical conformation which is stabilisedby the solvent molecules, in fact compound formation occurs. From the combined experimental data it was concluded that two different structural modifications exist within the solvent-included helical delta-phase,respectively the delta-phase in which the solvent molecules are intercalated and ordered between the phenyl ringsof sPS and a delta" phase where this solvent ordering is lost.