Control of the Anchoring Behavior of Polymer-Dispersed Liquid Crystals: Effect of Branching in the Side Chains of Polyacrylates | Zendy

Jian Zhou | Zendy; David M. Collard | Zendy; Jung O. Park | Zendy; Mohan Srinivasarao | Zendy

Open Access

Control of the Anchoring Behavior of Polymer-Dispersed Liquid Crystals: Effect of Branching in the Side Chains of Polyacrylates

Author(s) -

Jian Zhou,

David M. Collard,

Jung O. Park,

Mohan Srinivasarao

Publication year - 2002

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja027162a

Subject(s) - anchoring , liquid crystal , homeotropic alignment , side chain , branching (polymer chemistry) , polymer , acrylate , planar , chemistry , polymer chemistry , isotropy , acrylate polymer , glass transition , materials science , organic chemistry , copolymer , optics , optoelectronics , computer graphics (images) , structural engineering , physics , computer science , engineering

A temperature-driven anchoring transition in a polymer/nematic fluid composite that is far from the bulk nematic-isotropic transition temperature is reported. A series of poly(methylheptyl acrylates) were studied to probe the subtle effects of the side chain structure of the polymer on control of the anchoring. A polymer-dispersed liquid crystal film made from TL205 and 1-methylheptyl acrylate shows only planar anchoring over the temperature range studied, while the films made from TL205 and each of the other methylheptyl acrylates or n-heptyl acrylate show the homeotropic-to-planar anchoring transition at temperatures between 70 and 78 degrees C. An interfacial model is proposed in which the different conformation of the side chains is suggested as the cause for the dramatic difference in the observed anchoring behavior.

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