Abstract
Liquid crystal (LC) polymers can be divided into two kinds of compounds: main chain and side chain LC polymers. These two kinds of polymers exist as lyotropic or thermotropic LC polymers. In this report we will describe some properties and applications of main chain and side chain LC polymers.Main chain LC polymers, mainly composed of rigid mesogenic moieties, are used for high modulus fibres, reinforcement of optical fibres or specific molded parts.Side chain LC polymers can be used in optics and optoelectronics. Due to the combination of properties of liquid crystals and polymers they can be oriented, in the nematic phase, by an electric or magnetic field and frozen into a glassy state. In this state they show interesting properties like matrix for orientation of non linear optic moities (χ2 coefficient). We will describe in this field the properties of LC polyacrylates copolymer. Chiral smectic C* LC polymers have also been obtained in this family, they are pyroelectric and potentially piezoelectric.These LC polymers have also several interesting applications like information storage media. These applications will also be described.
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