本研究利用偏光顯微鏡(POM)、原子力顯微鏡(AFM)、電子顯微鏡(SEM)、微分掃描熱卡計(DSC)與傅立葉轉換式紅外線光譜儀(FTIR)分別探討生物可分解高分子聚對二氧環己酮(PPDO)單一成分系統，與混摻聚對位乙烯基酚(PVPh)後的結晶行為。第一部分為單純PPDO系統，改變結晶溫度(Tc)，以POM初步觀察球晶形貌，發現於特定區間Tc內，PPDO球晶有兩種形貌共存(Type-p與Type-n)，選擇Tc = 76 ℃之樣品進一步分析，以AFM和SEM觀察球晶外部與內部結構的晶板排列，並討論兩種形貌相似之處，推測PPDO雙環帶狀球晶的生長機制，接著將此雙環帶狀球晶與Tc = 90 ℃之樣品比較，觀察結晶溫度提高後，對環帶狀球晶之影響。第二部分為PPDO/PVPh混摻系統，先改變組成比例與結晶溫度，同樣以POM進行球晶形貌的初步觀察，發現PVPh比例增加，球晶的分枝特徵逐漸明顯，而表面仍然保有雙環帶形貌，形成特殊的dendritic ring-banded spherulite，選擇PPDO/PVPh (75/25)於一特定Tc下結晶，結合AFM與SEM的結果，逐步分析此特殊球晶形貌的分枝規則與球晶表面的纖維狀小分枝晶板排列，並分別比較樹枝狀與球核表面的週期性雙環帶形貌，探討週期性環帶狀晶板排列與形成樹枝狀球晶的關聯性。本研究結合上表面與內部之晶板排列對應關係，了解晶板週期性且不連續地堆疊，探討環帶狀球晶3-D的生長機制，並討論氫鍵作用力對球晶形貌造成的影響。

In the first part, neat PPDO ring-banded spherulites were observed at different Tc, demonstrating that the band spacing increases with increasing Tc. Dual-type ring-banded spherulites(Type-p and Type-n) only coexist at Tcs = 70-78 ℃. At Tc higher than 78 ℃, the band spacing decreases and the band becomes distorted. The top surface and interior lamellar arrangement of ring-banded spherulites of PPDO crystallized at 76 ℃ were investigated by using atomic-force microscopy (AFM), and scanning electron microscopy (SEM) to interpret the 3-D growth mechanism of ring-banded spherulites. And then we compare the difference between the spherulites crystallized at Tc = 76 and 90 ℃. Correlations between the top surface and interior assembly of double-ring bands are discussed.
In the second part, PPDO/PVPh(75/25) blend system shows special dendritic/ring-banded morphology. Using AFM and SEM to observe the crystal arrangement, the correlations between the dendritic structure and the ring-banded pattern on the top surface of each branch are discussed.

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