Side chain liquid crystal polyurethanes
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M. Brecl; M. Ε½igon; T. MalavaΕ‘iΔ
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Article
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1998
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John Wiley and Sons
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English
β 275 KB
π 2 views
A series of side chain liquid crystal polyurethanes (CnCNPs), in which the spacer length was varied from 2 to 12 methylene units, were synthesized by the addition polymerization of β£-[bis(2-hydroxyethyl)amino]--(4-cyanoazobenzene-4Π-oxy)alkanes (CnCN-diols) with hexamethylene diisocyanate. The liqui