ISSN:
0959-8103
Keywords:
chiral liquid crystalline acrylate
;
in-situ photopolymerization
;
orientation
;
birefringence
;
smectic phase
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The effect of the smectic and isotropic phase on the photo-polymerization of the chiral liquid crystalline 4-acryloxy-undecanyloxy-4′-[S(-)-2-methylbutyloxy]-biphenyl (monomer (I)) was studied using FTIR. The effect of temperature on the birefringence of surface-oriented monomer (I) and its polymer obtained by in-situ photopolymerization was also investigated. The results show that photopolymerization in the isotropic phase proceeds at a higher rate than in the smectic phase, when monomer conversion is less than 60%; however, when monomer conversion is above 60%, the photopolymerization rate is independent of the initial phase state of monomer (I), and a highly oriented liquid crystalline polyacrylate film can be prepared by in-situ photopolymerization of the surface-oriented chiral acrylate (I).
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pi.1995.210380215
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