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Issue 11, 2009
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Dipolar guest orientation in polymer co-crystals and macroscopic films

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Abstract

The crystal structures of δ-clathrates of syndiotactic polystyrene (s-PS) with highly polar guest molecules (nitrobenzene, NB and p-nitroaniline, NA) have been defined, on the basis of X-ray diffraction and FTIR linear dichroism analyses. The s-PS/NB co-crystal presents a structure very similar to those of the δ-clathrates already described in the literature, i.e. monoclinic and with the guest molecular plane nearly perpendicular to the host helical axes. The s-PS/NA co-crystal presents a definitely different structure, i.e. triclinic and with guest molecular planes inclined with respect to the host helical axes. The definition of the co-crystalline structures has allowed to establish that the ac// uniplanar orientation of the co-crystalline phase leads the guest dipoles roughly perpendicular to the film plane, i.e. to a dipole orientation suitable for poling processes. Films presenting a high degree of ac// uniplanar orientation of the s-PS/NA co-crystalline phase have been obtained and characterized by X-ray diffraction measurements.

Graphical abstract: Dipolar guest orientation in polymer co-crystals and macroscopic films

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Article information


Submitted
06 Mar 2009
Accepted
29 Jun 2009
First published
24 Jul 2009

CrystEngComm, 2009,11, 2381-2390
Article type
Paper

Dipolar guest orientation in polymer co-crystals and macroscopic films

O. Tarallo, V. Petraccone, C. Daniel and G. Guerra, CrystEngComm, 2009, 11, 2381
DOI: 10.1039/B904675P

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