Manfred Hermann Wagner (born 1948) is the author of Wagner model and the molecular stress function theory for polymer rheology.He is a Professor for Polymer engineering and Polymer physics at the Technical University of Berlin. He has published to date over 100 scientific papers. In 1981, he received the annual award of the British Society of Rheology . The Institute of Materials, London, awarded him the 2002. Wagner was the President of the German Society of Rheology 1991–2003, and he is Secretary of the European Society of Rheology since 1996.