The three-dimensional orientation of a crystalline polymer can be achieved via epitaxial growth from a nucleating agent under a modulated rotating magnetic field. Microcrystals with three different principal values of magnetic susceptibility tensors can be aligned three-dimensionally by modulated rotation under a static magnetic field. In this study, such magnetic processing is applied to poly(l-lactic acid) (PLLA) containing zinc citrate (ZnCit) as a nucleating agent under a PLLA melt. The X-ray diffraction patterns of the magnetically processed film showed that the PLLA crystals and ZnCit microcrystals are aligned three-dimensionally. The present method has potential not only for the orientation control of PLLA, which is required for optimizing the ability, but also for the investigation of epitaxy in a pair of crystalline polymers and nucleating agents.

中文翻译：

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通过磁取向成核剂外延生长实现结晶聚合物的三维取向


结晶聚合物的三维取向可以通过在调制旋转磁场下成核剂的外延生长来实现。具有三个不同磁化率张量主值的微晶可以通过在静态磁场下调制旋转来三维排列。在这项研究中，这种磁处理应用于聚左旋乳酸 (PLLA)，其中含有柠檬酸锌 (ZnCit) 作为聚左旋乳酸 (PLLA) 熔体中的成核剂。磁处理膜的X射线衍射图显示PLLA晶体和ZnCit微晶体是三维排列的。本方法不仅具有优化能力所需的 PLLA 取向控制的潜力，而且还可用于研究一对结晶聚合物和成核剂中的外延。