Ring-Banded Spherulitic Crystals of Poly(3-butylthiophene) via Controlled Solvent Evaporation
Ring-Banded Spherulitic Crystals of Poly(3-butylthiophene) via Controlled Solvent Evaporation
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DOI：
10.1002/macp.201800204
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发表时间：
2018-10-01
影响因子：
2.5
通讯作者：
Zhang, Shanju
中科院分区：
文献类型：
--
作者：
Armas, Jeremy A.;Reynolds, Karina J.;Zhang, Shanju
本文报道了通过控制溶剂蒸发法制备聚（3-丁基噻吩）薄膜中的环带球晶。球晶在偏振光和非偏振光下均显示出不寻常的同心环带结构。环带球晶的直径为300 ± 100 μ m，环带的周期为15 ± 2 μ m。球晶的周期性条带由脊和谷交替的表面图案组成，并且条带中的晶体薄片或多或少平行于球晶的径向生长方向。观察到类似于经典的非共轭聚合物的局部层状弯曲和分支。提出了一种可能的扩散诱导的节律生长机制来解释周期性带状球晶的形成。
The preparation of ring-banded spherulites in poly(3-butylthiophene) via controlled solvent evaporation of solution-cast films is reported. The spherulites display unusual concentric ring-banded structures under both polarized and unpolarized lights. The size of the ring-banded spherulites is 300 +/- 100 mu m in diameter and the periodicity of the bands is 15 +/- 2 mu m. The periodic bands of the spherulite consist of alternating ridge and valley surface patterns and the crystalline lamellae in the bands are more or less parallel to the radial growth direction of the spherulites. Local lamellar bending and branching are observed analogous to that of classical non-conjugated polymers. A possible diffusion-induced rhythmic growth mechanism is proposed to interpret the formation of periodic banding of the spherulite.