Vladimir Kubanek

Synthesis of block copolymers based on polycaprolactam-polybutadiene

Abstract Polyamide-polybutadiene segmented block copolymers of well defined structure and composition have been synthesized using α,ω-di-carboxyl-terminated polybutadiene (CTPB) as the initiator for the polymerization of caprolactam (CL) in bulk at 240°C. Both the yield and viscosity increased with the polymerization time and with the CL content in the feed. The segmented copolymers were characterized by i.r. spectra and elemental analysis. The thermal stability of CTPB was also examined using various types of antioxidants in various amounts.

A photochemical synthesis of bis(ethylenedithiolo)tetrathiafulvalene

Bis(ethylenedithiolo)tetrathiafulvalene was prepared by a photochemical desulphurization of 4,5-ethylenedithiolo-1,3-dithiole-2-thione (1), and the effect of the type of solvent, nucleophilic agent and its concentration, and temperature on the yield of the reaction is discussed.