Wu Chun-Ning, Nagarajan Selvaraj, Lee Li-Ting, Su Chean-Cheng, Woo Eamor M
Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan.
Department of Materials Science and Engineering, Feng Chia University, Taichung 407, Taiwan.
Polymers (Basel). 2023 Aug 20;15(16):3484. doi: 10.3390/polym15163484.
Self-assembly of 3D interiors and iridescence properties of poly(β-hydroxybutyric acid-co-β-hydroxyvaleric acid) (PHBV) periodic crystals are examined using microcopy techniques and microbeam X-ray diffraction. Morphology of PHBV can be tailored by crystallizing in presence of poly(vinyl acetate) (PVAc) or poly(trimethylene adipate) (PTA) for displaying desired periodicity patterns. The regular alternate-layered lamellae of banded PHBV crystal aggregates, resembling the structures the natural mineral moonstone or nacre, are examined to elaborate the origin of light interference and formation mechanisms of periodic lamellar aggregation of PHBV spherulites. By using PHBV as a convenient model and the crystal diffraction data, this continuing work demonstrates unique methodology for effectively studying the periodic assembly in widely varying polymers with similar aggregates. Grating structures in periodically assembled polymer crystals can be tailored for microstructure with orderly periodicity.
利用显微镜技术和微束X射线衍射研究了聚（β-羟基丁酸-co-β-羟基戊酸）（PHBV）周期性晶体的三维内部自组装和虹彩特性。通过在聚醋酸乙烯酯（PVAc）或聚己二酸三亚甲基酯（PTA）存在下结晶，可以调整PHBV的形态，以显示所需的周期性图案。研究了带状PHBV晶体聚集体规则的交替层状片晶，其类似于天然矿物月光石或珍珠母的结构，以阐述光干涉的起源和PHBV球晶周期性层状聚集体的形成机制。通过使用PHBV作为便捷模型并结合晶体衍射数据，这项持续的工作展示了一种独特的方法，可有效地研究具有相似聚集体的多种聚合物中的周期性组装。周期性组装的聚合物晶体中的光栅结构可以针对具有有序周期性的微观结构进行定制。
