Premium
A Main‐Chain de Vries Smectic Liquid Crystal Polymer Prepared by Hoveyda–Grubbs Catalyst Initiated Acyclic Diene Metathesis Polymerization
Author(s) -
Walba David M.,
Yang Hong,
Keller Patrick,
Zhu Chenhui,
Shao Renfan,
Coleman David A.,
Jones Christopher D.,
Clark Noel A.
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200900249
Subject(s) - metathesis , acyclic diene metathesis , polymerization , monomer , materials science , polymer chemistry , polymer , diene , liquid crystal , ring opening metathesis polymerisation , catalysis , phase (matter) , chemical engineering , organic chemistry , chemistry , composite material , natural rubber , optoelectronics , engineering
A main‐chain liquid crystalline polymer has been obtained by applying a Hoveyda–Grubbs 2nd generation catalyst in acyclic diene metathesis polymerization (ADMET) of a monomer containing on one end a terminal dimethylvinylsilyl group and at the other end a terminal CC double bond. This material showed an interesting Iso‐de Vries SmA* – SmC* – Glass phase transition with a very small layer shrinkage on progressing from the SmA* phase into the SmC* phase. Will this material present a helical structure along the fiber axis in the SmC* temperature range? Several physical characterization methods including XRD, optical observation, and microtome technique have been used to investigate the internal structural organization in this liquid crystalline fiber.