本研究應用偏光顯微鏡(POM)、原子力顯微鏡(AFM)、電子顯微鏡(SEM)及微分掃描熱卡計(DSC)分別探討：生物可分解性聚酯類聚對二氧環己酮(PPDO)與聚丁二酸二乙酯(PESu)之混摻系統及聚對苯二甲酸辛二酯(POT)，以熔融結晶的方式，形成之球晶形貌、上表面及內部晶板排列。
第一部分為PPDO/PESu混摻系統，首先以POM針對不同組成及結晶溫度進行球晶形貌初步的觀察，最後選擇PPDO/PESu (75/25)以及(50/50)的組成比例以p-dioxane蝕刻後做進一步的分析。PPDO/PESu (75/25)在固定結晶溫度(Tc) 75 oC下會形成三種不同球核形貌之球晶，分別是：double-spiral、single-spiral以及concentric rings，並推測其生長機制。接著利用AFM與SEM針對double-spiral球晶上表面及內部晶板排列進行一系列探討，表面觀察到晶板具有分枝以及與spiral方向一致的偏折行為。內部晶板同時存在與基材平行及垂直的兩種排列，連接表面與內部晶板之關聯性，建立三維晶板組裝分析，以提出合理完整地解釋週期層次結構。PPDO/PESu (50/50)組成中，結晶溫度不僅會影響表面晶板分枝情形與偏折的趨勢，對於valley的寬度同樣會有相當程度的作用。第二部分為POT系統，同樣結合AFM及SEM的結果觀察表面與斷截面之對應關係，提出可能的晶板生長機制以解釋週期層次結構。透過兩個系統的研究可以了解到內部週期層次結構由不連續的晶板排列建構而成，並非傳統觀念的連續性晶板扭轉所組成。

Morphologies and top-surface and interior lamellar arrangement of biodegradable polyesters, poly(p-dioxanone) (PPDO) blended with poly(ethylene succinate) (PESu) as well as poly(octamethylene terephthalate) (POT), have been investigated.
PPDO/PESu (75/25) blend system shows three different types of nuclei co-existing at Tc = 75 oC: double-spiral, single-spiral and concentric rings. For double-spiral spherulites, the lamellae turn into feather-like branches on the ridge which are arranged along the radial direction then submerge to the valley following bending away to the tangential direction consistent with the spiral direction. On the other hand, interior structure is composed of both edge-on lamellae and flat-on lamellae. Connecting the correlation between top surface and interior lamellar arrangement to construct 3-D crystal assembly for reasonably interpreting the periodic hierarchical structures. The same crystal assembly on the top surface can be found in lower composition of PPDO (50 %). However, the branch pattern as well as the width of the valley are influenced by different crystallization temperatures.
In POT system, we exploit atomic-force microscopy (AFM) and scanning electron microscopy (SEM) to reveal the mechanisms of formation of periodic hierarchical structures.

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