Preparation of block copolymers with polymeric azocarbamate as an initiator
Article first published online: 9 MAR 2003
Copyright © 1986 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 31, Issue 7, pages 2171–2183, 20 May 1986
How to Cite
Yürük, H., Özdemir, A. B. and Baysal, B. M. (1986), Preparation of block copolymers with polymeric azocarbamate as an initiator. J. Appl. Polym. Sci., 31: 2171–2183. doi: 10.1002/app.1986.070310720
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Accepted: 14 NOV 1985
- Manuscript Received: 21 JUN 1985
Block copolymers containing polystyrene and poly(ethylene oxide) or poly(propylene oxide) segments were prepared via chemical reactions. A stepwise procedure was first employed to prepare macroazocarbamates by capping poly(ethylene oxide) glycols or poly(propylene oxide) glycols and an aliphatic diisocyanate and subsequently by reacting this intermediate with an azobisalcohol. This macroazocarbamate was later used to initiate free radical polymerization at elevated temperatures. Styrene contents, molecular weights, and elastic modulus-temperature relationships were determined.