The life journey of Professor S. Penczek through the realm of polymer science.

This article is a special issue prepared in honor of Professor Stanislaw Penczek's 90th birthday and his significant contributions to polymer science. It provides a detailed account of Professor Penczek's life journey in the field of polymer science, from his education in Leningrad, Soviet Union, to his work in the Research Institute of Plastics in Warsaw and his later research in Lodz, Poland. The article highlights Professor Penczek's research on various polymerization processes, including cationic ring-opening polymerization and the copolymerization of sulfur-containing monomers. It also mentions his contributions to polymer terminology and nomenclature through his involvement with IUPAC. Professor Penczek's achievements and honors are recognized, and his personal interests in tennis, music, literature, and tourism are mentioned. [Extracted from the article]