Anna Wypych studied chemical engineering and polymer chemistry and obtained an M.Sc in chemical engineering. Her professional expertise includes both teaching and research & development. She specializes in polymer additives for PVC and other polymers, and evaluates their effect on health and environment. George Wypych has a Ph.D. in chemical engineering. His professional expertise includes both university teaching (full professor) and research and development. He has published 18 books, 47 scientific papers, and he has obtained 16 patents. He specializes in polymer additives, polymer processing and formulation, material durability and the development of sealants and coatings.