Thermotropic Behavior, Packing, and Thin Film Structure of an Electron Accepting Side-Chain Polymer

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• 作者：Peter Kohn ; Lilit Ghazaryan ; Gaurav Gupta ; Michael Sommer ; And艜e Wicklein ; Mukundan Thelakkat ; Thomas Thurn-Albrecht
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：July 24, 2012
• 年：2012
• 卷：45
• 期：14
• 页码：5676-5683
• 全文大小：576K
• 年卷期：v.45,no.14(July 24, 2012)
• ISSN：1520-5835

文摘

We report on the phase behavior and the structure of poly(perylene bisimide acrylate), an electron accepting semiconductor polymer with disclike side-chain units, in comparison to the corresponding low molecular weight perylene bisimide. By combination of DSC, optical microscopy, and temperature-dependent small-angle and wide-angle X-ray scattering, we show that both compounds display a lamello-columnar packing. While the perylene bisimide model compound crystallizes, the polymeric architecture of poly(perylene bisimide acrylate) suppresses order, leading to a 2D lamello-columnar liquid crystalline phase. The structure of the side-chain polymer in thin films with different thermal treatments as observed by GIWAXS correlates well with previously observed largely different electron mobilities. Such a polymeric, liquid crystalline compound combines the advantages of molecular order and easy processability, together with the film forming properties of polymeric materials.