Effects of Monomer Structure on Their Organization and Polymerization in a Smectic Liquid Crystal-Reference-Cited by-同舟云学术

Effects of Monomer Structure on Their Organization and Polymerization in a Smectic Liquid Crystal

Published:1997-01-03 Issue:5296 Volume:275 Page:57-59
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Guymon C. Allan¹,Hoggan Erik N.¹,Clark Noel A.²,Rieker Thomas P.³,Walba David M.⁴,Bowman Christopher N.¹

Affiliation:

1. C. A. Guymon, E. N. Hoggan, C. N. Bowman, Department of Chemical Engineering, University of Colorado, Boulder, CO 80309-0424, USA.

2. N. A. Clark, Department of Physics, University of Colorado, Boulder, CO 80309-0390, USA.

3. T. P. Rieker, Department of Chemical and Nuclear Engineering, Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87106, USA.

4. D. M. Walba, Department of Chemistry, University of Colorado, Boulder, CO 80309-0215, USA.

Abstract

Photopolymerizable diacrylate monomers dissolved in fluid-layer smectic A and smectic C liquid crystal (LC) hosts exhibited significant spatial segregation and orientation that depend strongly on monomer structure. Small, flexible monomers such as 1,6-hexanediol diacrylate (HDDA) oriented parallel to the smectic layers and intercalated, whereas rod-shaped mesogen-like monomers such as 1,4-di-(4-(6-acryloyloxyhexyloxy)benzoyloxy)-2-methylbenzene (C6M) oriented normal to the smectic layers and collected within them. Such spatial segregation caused by the smectic layering dramatically enhanced photopolymerization rates; for HDDA, termination rates were reduced, whereas for C6M, both the termination and propagation rates were increased. These polymerization precursor structures suggest novel materials-design paradigms for gel LCs and nanophase-separated polymer systems.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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