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Home  >  Journal list  >  Polymer Journal  >  Vol.14  No.11 (1982)  >  pp.895-905

Polymer Journal
<<Previous article Vol.14  No.11 (1982)   pp.895 - 905 Next article>>

Urethane Substituted Polydiacetylene: Synthesis and Characterization of Poly[4,6-decadiyn-1,10-diol-bis(n-butoxy-carbonyl-methyl-urethane)]

Kazunori Se1), Hiroshi Ohnuma1) and Tadao Kotaka1)
1) Department of Macromolecular Science, Faculty of Science, Osaka University

ABSTRACT:  A diacetylene having 3-methyl-n-butoxy-carbonylmethyl-urethane (3BCMU) as a substituent was synthesized and exposed to 60Co-γ ray at various doses to obtain a polymer, poly3BCMU. The polymers obtained at low doses were of fairly high molecular weight and narrow distribution and those at high doses were of relatively low molecular weight and broad distribution. Changes in color of high and low-dose samples in CHCl3 and n-hexane were compared. The critical solvent compositions (CHCl3 content) at which yellow-to-blue or blue-to-yellow changes occurred were independent of polymer concentration but varied with molecular weight and temperature. Visible absorption spectra and Raman spectra were compared for yellow CHCl3 and blue CHCl3/n-hexane solutions of a high dose sample. Non-Newtonian intrinsic viscosities of these solutions were also compared. The results all suggested that poly3BCMU assumes a more extended, planar conformation in a poor solvent CHCl3/n-hexane than in a good solvent CHCl3, in contrast to flexible polymers in these solvents.

Diacetyiene Derivative/ Solid State Polymerization/ Polydiacetylene/ Conductive Polymer/ Color Change/ Conformational Transition/ Raman Spectrum/ Dilute Solution Characteristics/ Intrinsic Viscosity

Published online: March 03, 2006
© Copyright, 2006 by The Society of Polymer Science, Japan



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