Study of the morphology of poly(butylene succinate)/poly(ethylene oxide) blends using hot-stage atomic force microscopy
Study of the morphology of poly(butylene succinate)/poly(ethylene oxide) blends using hot-stage atomic force microscopy
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DOI：
10.1016/j.polymer.2007.03.079
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发表时间：
2007-06
期刊：
影响因子：
4.6
通讯作者：
Haijun Wang;J. Schultz;Shouke Yan
中科院分区：
文献类型：
--
作者：
Haijun Wang;J. Schultz;Shouke Yan
将聚丁二酸丁二醇酯（PBS）和聚环氧乙烷（PEO）共混物浇铸成膜，熔融，结晶。使用范围为85/15至20/80的许多PBS/PEO共混物组合物。具有较高熔点的PBS总是首先结晶，从而提供PEO将在其上结晶的支架。AFM相位和高度图像在室温和更高的温度下，作为PEO熔化，允许一个确定的PEO的形态和位置。发现在低PEO浓度（低于15 w/o）下，PEO优先存在于PBS层之间。这种层间PEO不结晶，除非在极端过冷。在较高浓度下，PBS结晶支架内存在较大的无定形结构域，并且PEO可以在这些结构域中结晶。观察到两个意想不到的现象：（1）PEO从层间空间到表面的可逆渗出结晶和（2）在PBS支架中的无定形域内的PEO层片的不寻常的取向。
Blends of poly(butylene succinate) (PBS) and poly(ethylene oxide) (PEO) were cast into films, melted, and crystallized. A number of PBS/PEO blend compositions, ranging from 85/15 to 20/80 were used. The PBS, with a higher melting point, always crystallizes first, providing a scaffold on which the PEO would crystallize. AFM phase and height images were made at room temperature and at higher temperatures, as the PEO melted, allowing one to determine the morphology and location of the PEO. It was found that at low PEO concentrations (below 15w/o) the PEO resides preferentially between PBS lamellae. This interlamellar PEO does not crystallize, except under extreme undercooling. At higher concentrations, larger amorphous domains exist within the PBS crystalline scaffold and PEO can crystallize in these domains. Two unexpected phenomena are observed: (1) the reversible exuding of PEO from interlamellar spaces to the surface for crystallization and (2) an unusual orientation of PEO lamellae within amorphous domains in the PBS scaffold.