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Study of the conformations of poly(ε-caprolactam) and poly(ε-caprolactam)-polybutadiene block copolymers by FT i.r. spectroscopy with photoacoustic detection and by micro-Raman confocal spectroscopy

✍ Scribed by P. Schmidt; M.R. Fernandez; J.M. Pastor; J. Roda

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
671 KB
Volume
38
Category
Article
ISSN
0032-3861

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✦ Synopsis

The conformations of poly(e-caprolactam) and of poly(e-caprolactam)-block-polybutadiene copolymers were investigated by Fourier Transform infrared spectroscopy with photoacoustic detection (PA-FTi.r.) and by micro-Raman confocal spectroscopy. The lowering of the planar conformation content with increasing concentration of butadiene units was confirmed. In the surface layers formed by rapid saw-cutting and in the islands probably formed by microtome cutting, the content of the planar conformation was reduced. The content of the planar conformation increases on water treatment.

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## Abstract Anionic polymerization of ϵ‐caprolactam was initiated with the potassium salt of ϵ‐caprolactam and accelerated with phenyl isocyanate, toluylene diisocyanate, 4,4′‐diphenylmethane diisocyanate, some derivatives of these isocyanates (urethanes, ureas, and allophanates), or combinations o