Center for Degradable and Flame-Retardant Polymeric Materials (ERCPM-MoE), College of Chemistry, State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Sichuan University, Chengdu 610064, China.
J Phys Chem B. 2010 Nov 25;114(46):14827-33. doi: 10.1021/jp104709z. Epub 2010 Oct 29.
Miscibility and crystallization behaviors of poly(ethylene succinate)/poly(p-dioxanone) (PES/PPDO) blends were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). PES/PPDO blends are completely miscible as proved by the single grass transition temperature (T(g)) dependence of composition and decreasing crystallization temperature of the blends in comparison with the respective component. POM observation suggests that simultaneous crystallization of PES and PPDO components in the blends took place, spherulites of one component can crystallize inside the spherulites of the other component, and the unique interpenetrated crystalline morphology has been formed for the blends in the full composition range. Isothermal crystallization kinetics of the blends was studied by DSC and the data were analyzed by the Avrami equation. The results suggest that the crystallization mechanisms of the blends were unchanged but the overall crystallization rates were slowed down compared with neat PES and neat PPDO. WAXD results indicate that the crystal structures of PES and PPDO did not change in the blends.
采用差示扫描量热法（DSC）、偏光显微镜（POM）和广角 X 射线衍射（WAXD）研究了聚琥珀酸乙二酯（PES）/聚对二氧环己酮（PPDO）共混物的混溶性和结晶行为。证明 PES/PPDO 共混物完全混溶，这是由组成的单一草转变温度（T（g））依赖性和与各组分相比降低的共混物结晶温度证明的。POM 观察表明，共混物中 PES 和 PPDO 组分同时结晶，一种组分的球晶可以在另一种组分的球晶内结晶，并且在整个组成范围内形成了独特的互穿结晶形态。通过 DSC 研究了共混物的等温结晶动力学，并通过 Avrami 方程对数据进行了分析。结果表明，与纯 PES 和纯 PPDO 相比，共混物的结晶机理没有改变，但整体结晶速率减慢。WAXD 结果表明，PES 和 PPDO 的晶体结构在共混物中没有变化。
