Department of Chemical and Materials Engineering, National University of Kaohsiung, No. 700, Kaohsiung University Rd., Nan-Tzu Dist., Kaohsiung, 811, Taiwan.
Phys Chem Chem Phys. 2013 Feb 21;15(7):2495-506. doi: 10.1039/c2cp43523c. Epub 2013 Jan 15.
The oppositely oriented lamellae in ridge and valley bands of ring-banded spherulites in biodegradable poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) interacting with amorphous poly(vinyl acetate) (PVAc) were examined using polarized-light optical, scanning electron, and atomic-force microscopy techniques (POM, SEM, AFM). Solvent-etching and fracturing were utilized for probing the interior morphology of the large-size ring-banded spherulites in PHBV/PVAc (70/30) blend [T(c) = 110 °C] films or thick bulk of various thicknesses. SEM analysis revealed that dual ridges of two opposite-oriented lamellae correspond to two-color bands (yellow and blue) of successive rings in POM micrographs. Fracture of thick blend samples further exposed that interior 3D spherulites were composed of sheath-kebab (similar to corrugated board) lamellae of two mutually perpendicular orientations.
采用偏光光学显微镜、扫描电子显微镜和原子力显微镜技术（POM、SEM、AFM）研究了与无定形聚醋酸乙烯酯（PVAc）相互作用的可生物降解聚（3-羟基丁酸-co-3-羟基戊酸）（PHBV）环带球晶的脊谷带中取向相反的片晶。对 PHBV/PVAc（70/30）共混物[T(c)=110°C]薄膜或不同厚度的厚块状物中的大尺寸环带球晶的内部形态进行了溶剂蚀刻和断裂研究。SEM 分析表明，两个取向相反的片晶的双重脊与偏光显微镜照片中连续环的双色带（黄色和蓝色）相对应。厚共混物样品的断裂进一步表明，内部 3D 球晶由两个相互垂直取向的鞘串珠（类似于瓦楞纸板）片晶组成。
