本研究利用偏光顯微鏡(polarized-light optical microscopy, POM)、掃描式電子顯微鏡(scanning electron microscopy, SEM)、廣角度X光繞射儀(microbeam wide-angle X-ray diffraction, WAXD)、小角度X光散射儀(microbeam small-angle X-ray scanning, SAXS)、微分掃描熱卡計(differential scanning calorimeter, DSC)，探討生物可分解高分子聚對二氧環己酮(poly(p-dioxanone), PPDO)摻合聚對位乙烯基酚(poly(vinyl phenol), PVPh)及單寧酸(tannic acid, TA)，形成環帶狀球晶之結晶行為、表面形貌及內部晶板排列。第一部分為PPDO/PVPh混摻系統，在PPDO中加入不同比例的PVPh，改變熔融溫度(Tmax)、結晶溫度(Tc)，以POM初步觀察球晶形貌，接著以環帶最規則，Tc = 88 oC之樣品進一步藉由SEM觀察球晶上表面細部結構。第二部分為PPDO/PVPh/TA混摻系統，先改變結晶溫度，同樣以POM初步觀察並選出Tc = 78 oC，環帶規則且整體形貌特殊的樹枝狀雙環帶球晶深入分析，並找出最合適的蝕刻條件，再透過SEM分析上表面和內部晶板排列，發現到球晶上表面存在順時針與逆時針兩種不同方向的羽毛狀分形構成週期性環帶的波峰(ridge)，不完美結晶的浮凸紋路構成波谷(valley)，從球晶斷截面判斷ridge及valley，分別可以對應到垂直於基材(edge-on)的晶板和平行於基材(flat-on)的晶板。接著利用synchrotron microbeam WAXD及SAXS輔助說明本研究的兩個混摻系統PPDO/PVPh及PPDO/PVPh/TA內部的晶板排列方向，進而推測出PPDO球晶的三維結構和生長機制。最後探討PPDO的像素化虹彩性質，針對週期性環帶球晶的有序結構，分析虹彩現象存在的條件。本研究主要討論氫鍵作用力對球晶形貌造成的影響，並結合上表面與內部晶板排列之對應關係，建立出週期性環帶球晶的3-D生長機制。

Poly(p-dioxanone) (PPDO) is a synthetic poly(ester-ether) used in numerous medical applications due to its distinguished biodegradability and biocompatibility. PPDO is blended with poly(p-vinylphenol) (PVPh) and tannic acid (TA). The addition of PVPh and TA can be diluent to induce dendritic-ringed PPDO spherulites and make the fractal-growth branches on the top surface more distinctive. PPDO with varying content of TA and PVPh at different crystallization temperature (Tc) were evaluated by using polarized optical microscopy (POM) and scanning electron microscope (SEM). Morphologies and interior lamellar arrangement of PPDO/PVPh and PPDO/PVPh/TA blend systems have been investigated. Microbeam small-/wide-angle X-ray scattering (SAXS/WAXD) was used to further confirm the results observed by SEM. The results show that the ridge is composed of feather-like branches and the valley has some embossed structure. In order to probe growth mechanism of ring-banded spherulites, correlation of top surface and interior structure was also investigated. The aim is to analyze the lamellar arrangement of PPDO with TA and PVPh. From the results of fractured surface, they are composed of two perpendicular orientations as ridge and valley. Interior structure is composed of edge-on lamellae in ridge and flat-on lamellae in valley. This study explored possible correlations between the surface on top, the internal grating architecture, and the photonic iridescence properties.

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