Abstract
Abstract Combined main chain/side chain polymers carry rigid rod-like mesogenic units both in the side chain and along the chain backbone. The properties of such combined systems are expected to be controlled by the competition of the interactions between the mesogenic units in the side and main chains as well as the tendency of the chain backbones to maximize their entropy. The thermodynamic, structural and dynamic properties of such combined main chain/side chain liquid-crystalline polymers were investigated for various chain architectures. The combined systems were found to display properties corresponding in many cases to a favourable superposition of properties characteristic of both main and side chain systems. These include high transition temperatures (up to 530 K) and broad ranges of stability of liquid-crystalline phases (up to about ΔT = 170 K). The orientational order parameter was found to approach values of 0.9 and it was possible to orient some of the polymers in weak external fields such a...
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