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Association between polyether–polyamine block-copolymers and low molecular weight polyacids in solution

✍ Scribed by Veska Toncheva; Roumiana Velichkova; Geert Trossaert; Eric J. Goethals

Book ID
104528639
Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
324 KB
Volume
31
Category
Article
ISSN
0959-8103

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✦ Synopsis

Abstract

An ABA block‐copolymer in which A is a poly(N‐tert‐butylimino‐ethylene) segment and B a poly(oxytetramethylene) segment has been prepared. The salt form of this polymer, obtained with low molecular weight polycarboxylic acids such as citric acid or benzene‐1,3,5‐tricarboxylic acid, was found to form ionic networks in organic solvents of low or medium polarity, when the concentration of the polymeric salt exceeded a critical concentration, between 2 and 4wt%. The viscosities of the polymeric salt solutions were strongly pseudoplastic, showing a yield point and thixotropic behaviour.

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