本研究利用微分掃描熱卡計(Different Scanning Calorimeter，DSC)、偏光顯微鏡(Polarized Optical Microscopy，POM)、原子力顯微鏡(Atomic Force Microscopy，AFM)和掃描式電子顯微鏡(Scanning Electron Microscopy，SEM)來探討兩成份摻合系統聚羥基丁酸酯共聚羥基戊酸酯 (PHBV)/聚己二酸二丙酯(PTA)之相容性、球晶形貌、相行為、晶板微結構等分析，並探討熔融溫度和環帶狀球晶之間的相關性及可能的機制進行分析。首先將PHBV/PTA以固定的熔融時間(tmax)熔融溫度(Tmax)做熱處理以消除其熱歷史，再以特定的結晶溫度(Tc = 60oC ~ 80oC)結晶觀察球晶形貌，相較於許多研究指出結晶溫度對球晶形貌的影響，熔融溫度和熔融時間對球晶形貌的影響則相對較少。使用不同Tmax處理試樣，在偏光顯微鏡下發現Tmax較高時，球晶成核密度會降低，球晶尺寸會變得較大較規則。然而當使用不同tmax處理試樣，在偏光顯微鏡下發現提高tmax對球晶形貌並沒有形成明顯的差異。接著將樣品製備成塊材，觀察其內部的型態，可以發現不論在內部或表面，都可以產生具有消光環的球晶。為了更進一步觀察晶板的排列，利用蝕刻將PTA和結晶不完美的PHBV洗掉，由AFM結果可知，在ridge晶板是以徑向方向排列組成的，valley晶板則是以稍微傾斜圓周方向排列組成的。在SEM斷截面的結果可以明顯觀察到，在ridge下晶板是以垂直於基材方向排列，並以分枝或彎曲的方式轉變成valley以平行基材方向排列的晶板。形成PHBV 雙重環帶狀球晶(double ring-banded)，並非由連續性晶板扭轉所組成的，而是由互相垂直的晶板，週期性重複排列所組成的。

Poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) was crystallized in the presence of poly(trimethylene adipate) (PTA) to study the morphology of PHBV in the mixture. Spherulitic morphology of PHBV in PHBV/PTA (75/25) blend was examined at specific crystallization temperature (Tc) from 60oC to 80oC after being firstly melted at a melt temperature (Tmax) for a period of melting time (tmax). Tc is widely known to influence the spherulitic morphology; however, effects of Tmax and tmax on spherulitic morphology have been less studied. The maximum melting temperature (Tmax) and melting time (tmax) imposed on the samples affect formation and geometry of nuclei, which in turn shape the patterns of the ring-banded morphology of PHBV in PHBV/PTA blend. The results indicate that the spherulites of PHBV/PTA blends tend to become larger and more regular after being melted at higher Tmax; ring band patterns are also correspondingly different with respect to different Tmax. After being melted at longer tmax, the spherulitic morphology of PHBV/PTA blend does not show any significant difference. The lamellar arrangement in the final banding patterns as influenced by Tmax was analyzed by using polarized optical microscope (POM), atomic-force microscopy (AFM) and scanning electron microscopy (SEM). Correlations between Tmax and ring-band patterns were analyzed for possible mechanisms.

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