|Title||perpendicular organization of macromolecules: synthesis and alignment studies of a soluble poly(iptycene).|
|Publication Type||Journal Article|
|Year of Publication||2005|
|Authors||Thomas, SW, Long, TM, Pate, BD, Kline, SR, Thomas, EL, Swager, TM|
|Journal||Journal of the American Chemical Society|
|Keywords||perpendicular organization macromol alignment soluble polyiptycene|
We describe herein a polymeric material that prefers to align perpendicular to a stretch-aligned polymer host in the solid state. Poly(iptycene) poly-1 was synthesized from monomer 1 under hyperbaric techniques via a Diels-Alder polymerization. Polarized excitation spectra of the anthracene end groups in this material in a stretch-aligned, solution-cast poly(vinyl chloride) (PVC) film showed that the poly(iptycene) prefers to align normal (counter aspect ratio) to the stretching direction of the PVC. This is explained by a \"threading\" mechanism, whereby the PVC intercalates through the internal free volume presented by poly-1, similar to effects observed in small molecule iptycenes under similar conditions.