Clathrates with tetrahydrofuran of styrene-p-methyl styrene co-syndiotactic
copolymers have been characterized by wide-angle X-ray scattering and diff
erential scanning calorimetry. Stable clathrate structures with THF molecul
es have been observed in whole range of composition. In particular, syndiot
actic polystyrene like and syndiotactic poly-p-methylstyrene like clathrate
phases are obtained for p-methylstyrene contents lower and higher than 35%
by mel, respectively.