Nitroso spin labeling of polymers containing main chain double bonds: an electron spin resonance study

• Published in: Macromolecules 1987-12, Vol.20 (12), p.3083-3086
• Main Authors: Gyor, Miklos, Rockenbauer, Antal, Tudos, Ferenc
• Format: Article
• Language: English
• Subjects: Applied sciences; Chemical modifications; Chemical reactions and properties; Exact sciences and technology; Organic polymers; Physicochemistry of polymers
• ISSN: 0024-9297; 1520-5835
• DOI: 10.1021/ma00178a025

The method of nitroso spin labeling offers a simple and versatile route for obtaining nitroxyl functionalized macromolecular chains using such polymers as polybutadiene, polyisoprene and polyisoprine-co-isobutylene copolymer. The only requirement is the presence of appropriate C=C double bonds along the polymer chain. It is to be noted that the so-called forced ideal quasi-living (FIQL) copolymerization method provides a particularly good procedure for preparing tailor-made copolymers with controlled composition and molecular weight. By use of this technique, even a very small relative amount of diene as comonomer can be incorporated into the polymer chain in a way that the microstructure of the copolymer, i.e the sequence distribution along the chain, remains uniform. Another and so far not yet fully exploited feature of the FIQL copolymerization technique is that it works best in producing low molecular weight polymeric species, an inexhaustible pool of starting materials to obtain labeled polymers and macromolecular spin probes. 40 ref.--AA