Bound solvent in different stereoregular syndiotactic polypropylene gels

- Syndiotactic polypropylene (sPP)/o-dichlorobenzene gel was investigated by thermal analysis, solid-state NMR, etc.
- Different stereoregular sPP's with racemic diad of 98% (sPP98) and 83% (sPP83) were used.
- The coagulation size of bound solvent of the sPP98 gel was smaller than that of the sPP83 gel.
- Non-freezable solvent is bound in the interphase.
- Large coagulation size of bound solvent was formed for higher gelation temperature.