Rigid rod polyelectrolytes with frozen-in free volume: High conductivity at low RH

Authors

Morton Lift, Case School of Engineering
Sergio Granados-Focil, Clark UniversityFollow
Junwon Kang, Samsung Group

Document Type

Conference Proceeding

Abstract

Aromatic rigid-rod polyelectrolytes have been made that have "frozen-in free volume". Homopolymers and copolymers form liquid crystalline arrays that cannot pack closely due to steric hindrance. They form nano-channels that absorb and hold water very strongly. This enables them to retain conductivity at very low relative humidities. Conductivity versus λ at various temperatures for two homopolymers, poly(p-phenylene 2, 5-disulfonic acid), PPDSA, and poly(p-biphenylene 3, 3'-disulfonic acid), PBPDSA, is shown. Data are presented and analyzed for PPDSA showing that the "frozen-in free volume" for this material is about 63 cc per-SO 3H group (λ,=3.5). Comparison of a graft polymer of PBPDSA with the homopolymer showed that bulky grafted moieties facilitated higher water absorption in the mid relative humidity range, while hydrophobic bonding of the non-polar groups retarded swelling at higher humidities. © 2010 American Chemical Society.

Publication Title

ACS Symposium Series

Publication Date

4-30-2010

Volume

1040

First Page

49

Last Page

63

ISSN

0097-6156

DOI

10.1021/bk-2010-1040.ch004

Repository Citation

Lift, Morton; Granados-Focil, Sergio; and Kang, Junwon, "Rigid rod polyelectrolytes with frozen-in free volume: High conductivity at low RH" (2010). Chemistry. 89.
https://commons.clarku.edu/chemistry/89