Propagation of Elliptically Polarized Light through Ordered Block Copolymers
Propagation of Elliptically Polarized Light through Ordered Block Copolymers
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DOI：
10.1021/acs.macromol.1c01134
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发表时间：
2021-09-09
期刊：
影响因子：
5.5
通讯作者：
Garetz, Bruce A.
中科院分区：
文献类型：
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作者：
Sharrock, Chappel J.;Cho, Ja Eon;Garetz, Bruce A.
有序嵌段共聚材料的颗粒结构会影响其力学、电学和光学性能，而去偏振光散射已被证明是表征这种颗粒结构的一种有用的方法。在这项研究中，我们通过八种不同类型的椭圆偏振(EP)光通过样品获得并分析了有序两嵌段共聚物/锂盐混合物的DPLS图样，并证明了这些图样符合椭球颗粒模型(EGM)，该模型假设样品由随机取向的椭球颗粒组成，其光轴与其形状轴重合。EP光探测样品中不同于线偏振光或圆偏振光的颗粒数量，因此可用于表征具有各向异性颗粒取向分布的样品。
The grain structure of an ordered block copolymer material affects its mechanical, electrical, and optical properties, and depolarized light scattering (DPLS) has proven to be a useful method for characterizing this grain structure. In this study, we obtain and analyze DPLS patterns from an ordered diblock copolymer/lithium salt mixture by propagating eight different types of elliptically polarized (EP) light through the sample and demonstrate that the patterns are consistent with the ellipsoidal grain model (EGM), which assumes that the sample consists of randomly oriented ellipsoidal grains with optic axes coincident with their shape axes. EP light probes a different population of grains in a sample than either linearly or circularly polarized light and thus may be useful for the characterization of samples with anisotropic grain orientation distributions.