Improved thermal stability of pyroelectric polymers by crosslinking of ferroelectric liquid crystals
2001 (English)In: Journal of Physical Chemistry B, ISSN 1089-5647, Vol. 105, no 42, 10223-10227 p.Article in journal (Refereed) Published
Monofunctional ferroelectric liquid crystalline monomers and a blend of monofunctional/lbifunctional ferroelectric liquid crystalline monomers were photopolymerized, yielding a side-chain liquid crystalline polymer and a cross-linked polymer, respectively. The cross-linked polymer exhibited higher thermal stability than the side-chain liquid crystalline polymer and was pyroelectric up to 170 degreesC, whereas the side-chain liquid crystalline polymer lost most of its pyroelectricity at 38 degreesC. It is shown by electrooptic and birefringence measurements that cross-linking in the unwound SmC* phase prevented the reoccurrence of the helical superstructure.
Place, publisher, year, edition, pages
2001. Vol. 105, no 42, 10223-10227 p.
c-asterisk phase, 2nd-harmonic generation, polarization, photopolymerization, plcp
IdentifiersURN: urn:nbn:se:kth:diva-21054ISI: 000171805100011OAI: oai:DiVA.org:kth-21054DiVA: diva2:339751
QC 201005252010-08-102010-08-10Bibliographically approved