本研究利用偏光顯微鏡(POM)、電子顯微鏡(SEM)及原子力顯微鏡(AFM)探討生物可分解性高分子聚丁二酸丁二醇酯(PBSu)與其同分異構物高分子聚己二酸二乙酯(PEA)摻合體之結晶行為，透過改變不同的參數觀察其對球晶形貌、晶板排列方式所產生之影響，並推測其生長機制。
在PBSu / PEA摻合系統中，首先在crystalline/armophous情況下改變組成比例及結晶溫度(Tc)以POM進行球晶形貌的初步觀察，並發現隨著PEA含量增加或結晶溫度(Tc)提高會有不同的形貌：球晶會從單一的環帶狀形貌，先轉變成被扇形分割成環帶狀與枝狀的雙型態球晶——sector-face球晶，最後再變成單一的枝狀球晶。在PBSu / PEA摻合系統為crystalline/crystalline下，探討兩高分子間相互結晶對形貌之影響，並推測其結晶行為。之後利用SEM及AFM分別針對環狀球晶、sector-face球晶以及枝狀球晶做進一步的分析，並探討球晶上表面及內部晶板的排列與推測其生長機制，最後聯結三種球晶晶板排列的關聯性。透過本研究的鑑定，可以了解球晶晶板排列方式不論是在單一形貌的球晶或複合球晶中，相同形貌之間晶板會有相似的排列方法及生長機制。

Morphology investigations were conducted on crystal assembly mechanisms resulted from melt-crystallization of nonequimolar blends of poly(butylene succinate) (PBSu) with isomeric poly(ethylene adipate) (PEA). For PBSu/PEA blend systems, as crystallization temperature (Tc) and PEA content increase, the morphology of PBSu changes from ring-banded to sector-face pattern, and finally becomes dendritic morphology. Sector-face spherulites means a single spherulite sectored into two distinct patterns. In addition, we also utilize atomic force microscopy (AFM) and scanning electron microscopy (SEM) to observe top surface and fractured surface in order to explore the inner lamellar arrangement. Combining both top surface and fractured surface analyses, reasonable growth mechanisms of three types of spherulite (ring-banded, dendritic, sector-face) in PBSu/PEA blend systems were proposed. For both faces (ring-banded vs. dendritic) of the sector-face PBSu spherulites, lamellar assembly mechanism differs, but the growth is similar by repeating with periodic multiplication of fractal branches (whose number is proportional to square of radius) in the next cycle; thus, the lamellae fractal branches not only able to interpret the periodic optical banding, but also account for filling the expanding spherulite.

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