The Crystallization, Melting Behavior and Crystal Structure of Syndiotactic Polystyrene/Styrenic Polymers Blends

• Main Authors: Chun-Saang Lau, 劉振生
• Other Authors: Fang-Chyou Chiu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/83896561030591645041

碩士 === 長庚大學 === 化工與材料工程研究所 === 92 === This work examined the miscibility, crystallization behavior, melting behavior and crystal structure of syndiotactic polystyrene (sPS)/styrenic polymers blends. Differential scanning calorimetry (DSC), polarized optical microscopy (POM) and wide angle x-ray diffraction (WAXD) techniques were used to approach the goals. The experimental results indicated that these blends showed single glass temperatures (Tg’s), implying the miscibility of these blends in the amorphous state regardless of the styrenic polymer type. The melt crystallization of sPS were hindered with incorporation of various styrenic polymers. Complex melting behavior was observed for parent sPS and its blends as well. Compared with the results of WAXD study, the observed complex melting behavior resulted from the mixed polymorphs (i.e. the α and β forms) along with the melting-recrystallization-remelting of the β form crystals during the heating scans.