Well-defined side-chain liquid-crystalline polysiloxanes

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Hempenius, Mark A. and Lammertink, Rob G.H. and Vancso, G. Julius (1996) Well-defined side-chain liquid-crystalline polysiloxanes. Macromolecular Rapid Communications, 17 (5). pp. 299-303. ISSN 1022-1336

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Abstract:A route to well-defined side-chain liquid-crystalline polysiloxanes (ratio of weight-to number-average molar masses Mw/Mn < 1.2 is reported. Anionic ring-opening polymerization of pentamethylvinylcyclotrisiloxane yielded a poly(dimethylsiloxane-co-methylvinylsiloxane) backbone. A flexible disiloxane spacer was used to connect 4-(ω-alkenyloxy)-4'-cyanobiphenyl mesogenic molecules to the vinyl groups which belong to the backbone, leading to a side-chain liquid-crystalline polysiloxane (SCLCP) which has its mesogens distributed regularly along the main chain. Preliminary measurements indicate an electro-optic switching time s = 1 min at 20°C and 7 s at 32°C (dc, 5 V/µm)).
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Copyright:© 1969 Wiley InterScience
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/71254
Official URL:http://dx.doi.org/10.1002/marc.1996.030170503
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