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中文摘要：
利用原子力显微镜（AFM）系统地研究了聚ε-己内酯（PCL）在物理受限空间，即在薄膜、超薄膜中的结晶行为．结果表明，PCL的结晶形态与薄膜的厚度有关．当薄膜的厚度大于2Rg（Rg为回转半径）时，高分子结晶形态呈现球晶；当厚度介于Rg-2Rg之间时，高分子结晶生成枝蔓或树枝状结构；当厚度小于Rg时，其结晶形态为“岛”状结构．讨论了结晶温度、分子量与基底等对高分子结晶形态的影响．PCL在薄膜中的结晶是一个扩散控制的动力学过程，其生长机理可以用有限扩散凝聚（DLA）来解释．
英文摘要：
The confined crystallization behavior of polycaprolaetone （PCL） in thin and ultrathin films was studied by AFM （atomic force microscopy）. It was found that the crystalline morphology of PCL depended on the film thickness. When the thickness d 〉 2Rg （radius of gyration）, the polymer can crystallize into sphemlites; when Rg 〈 d 〈 2Rg ,the dense-branch morphology and dendrites could be found; when d 〈 Rg, the ＂islands＂ structure could be obtained. Moreover, the effects of the crystallization temperature, substrate and the molecular weight on the crystalline morphology were discussed. It was shown that the crystallization of PCL in thin film is a diffusioncontrolled process, and it can be explained by diffusion-limited aggregation.
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