V. Percec, M. Kawasumi, P. Rinaldi
Jul 1, 1992
Citations
1
Influential Citations
62
Citations
Journal
Macromolecules
Abstract
The synthesis of cyclic monomer, dimer, trimer, tetramer, and pentamer based on 1-(4-hydroxy-4'-biphenylyl)-2-(4-hydroxyphenyl)butane (TPB) and 1,10-dibromodecane and their characterization are presented. Their phase behavior was compared with that of the linear high molecular weight polymer based on TPB and 1,10-dibromodecane. The cyclic monomer is liquid. The larger cyclic compounds exhibit a nematic mesophase and a very slow crystallization tendency. Their melting temperature shows an odd-even dependence on ring size, while their isotropization temperature shows a continuous increase with increasing ring size