Synthesis of Side Chain Liquid Crystal Polymers by Living Ring Opening Metathesis Polymerization. 1. Influence of Molecular Weight, Polydispersity, and Flexible Spacer Length (n=2-8) on the Thermotropic behavior of the Resulting Polymers
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ABSTRACT IwI2001 ~Olds) The living ring opening metathesis polymerization of 5-carbo(n-[(4'-methoxy-4-biphenylyl)oxy]alkyl)bicyclo[2.2.1]hept-2-ene (1-n, n=2-8) by Mo(CH-t-Bu)(NAr) (0-t-Bu) 2 (Ar=2,6-C 6 H 3 -t-Pr 2 ) is described. Polymers with degrees of polymerization from 5 to 100 and narrow molecular weight distributions (Mw/Mnz1.05-1.24) were obtained in high yield. All polymers exhibit an enantiotropic nematic mesophase. Glass transition and isotropization temperatures in… Show more
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