𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Voltage-dependent phase transition and pyroelectric effect in a new chiral smectic polymer

✍ Scribed by M.V. Kozlovsky; S.A. Pikin; W. Haase


Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
534 KB
Volume
31
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis


Abtract-A new chiral smectic side chain polymer has been synthesized showing a ferroelectric Sm C* phase between the isotropic and smectic B phases. The clearing phase transition (on heating) depends on the d.c. voltage applied. This behaviour could be explained by some theoretical consideration. Pyroelectric measurements give the maximum value of spontaneous polarization for the polymer P, u 4.0 nC/cm2.


πŸ“œ SIMILAR VOLUMES


Investigation of the electrothermo-optic
✍ Huai Yang; Hirokaku Yamane; Hirotsugu Kikuchi; Hirokazu Yamane; Guo Zhang; Xinfa πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 222 KB πŸ‘ 2 views

A sharp change in transmittance from a transparent state to a light scattering one within a tiny temperature range is induced accompanied with the heat-induced phase transition from a smectic-A (S A ) phase to a chiral nematic (N\*) one in a sidechain smectic-A liquid crystalline polymer ( S A LCP)

Phase structures and transition behavior
✍ Kevin W. McCreight; Jason J. Ge; Mingming Guo; Ian Mann; Fuming Li; Zhihao Shen; πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 393 KB πŸ‘ 2 views

A series of organo-soluble hairy-rod polyimides was recently synthesized from 3,3Ј,4,4Ј-biphenyltetracarboxylic dianhydride (BPDA) and di[n-alkyl]-4,4Ј-diamino-6,6Ј-dibromo-2,2Ј-biphenyldicarboxylate with side chains of varying lengths (the numbers of methylene units), BACBP(n). Dynamic mechanical (