Ring-expansion living radical polymerization of cyclic polyolefines derived from nitroxide-based biradicals

Abstract

Cyclic polymers are interested in their low melting points, viscosity, etc, in comparison with their corresponding linear chain analogue. On the other hand, physical properties of cyclic polymers have not been investigated widely, because efficient synthetic methods have not been developed. We designed and prepared novel precursor, having two reaction points derived from nitroxide-based diradical, for ring-expansion polymerization of polyolefines. As the result, we succeeded to prepare ring polystylenes using these new precursors. The details of reaction will be discussed with GPS, MALDI-TOF-MS, and some other spectroscopic data.