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Block copolymers polycaprolactam-polystyrene-polycaprolactam prepared by the anionic polymerization of caprolactam

✍ Scribed by J. Stehlíček; J. Šebenda

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
484 KB
Volume
13
Category
Article
ISSN
0014-3057

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✦ Synopsis

ABA block copolymers, where A and B represent polyamide and polystyrene segments respectively, were prepared by the anionic polymerization of caprolactam activated with polystyrene-bisacyllactams. Under mild polymerization conditions (in a solvent at 120°), very pure copolymers were obtained containing only traces of polystyrene homopolymer and < 2.5% of polycaprolactam. The length of the blocks A can be controlled by the polymerization time and by the amount and type of the solvent.

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