Crystallization study of syndiotactic polystyrene via time-resolved x-ray scattering and diffraction methods

摘要

Syndiotactic polystyrene (s-PS) is an emerging engineering resin which has a complicated crystallization and polymorphic behavior.So far four different crystalline forms have been reported.The alpha and beta forms contain planar zig-zag chains with c=5.1 A (along the chain direction),and two others,delta and gamma forms,containing s(2/1)a helical chains c=7.8 A long the chain direction.