Abstract
The hydrodynamic and electro-optical properties of poly(butyl isocyanate) (PBIC) † molecules have been studied. It is shown that change in the amount of PFP in the solvent system (up to 20%) brings about a reversible, five fold change in the equilibrium rigidity of the PBIC macromolecules. Coiling of the PBIC molecular chains when the concentration of PFP in the solvent is increased is a result of the effect of the aromatic component of the solvent on the mechanism of conjugation in the main chain of this polymer. It was found that the observed conformational changes in the PBIC chains cannot be identified with the helix-random coil type of transition in polypeptides.
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