The Phase Transition of Syndiotactic Polystyrene Induced by Electrostatic Field

The crystal structure and morphology of syndiotactic polystyrene (sPS) melt crystallized in various electrostatic fields have been investigated by using wide angle X ray diffraction (WAXD), differential scanning calorimeter (DSC) and scanning electron microscope (SEM). WAXD and DSC analyses show that sPS is gradually transformed from α phase to β phase with increase of electrostatic intensity. The SEM observations indicate that the morphology of sPS micro crystals is strongly dependent on electrostatic intensity applied to the sample during solidification. The variation of the micro crystals orientation from disordered lamellae to ordered lamellare have been observed with increase of electrostatic intensity.

电场诱导下的间规聚苯乙烯晶体结构和形态研究

用 WAXD、DSC和 SEM研究了高真空强静电场下熔融结晶的间规聚苯乙烯晶体结构和形态。实验发现 ,随电场强度的增大 ,间规聚苯乙烯晶体逐渐由 α相向 β相转变 。