About Bruno Vergnes Bruno Vergnes is Research Director at the Polymer and Composites research unit of the Center for Material Forming (CEMEF) of MINES ParisTech and an expert in rheology and extrusion processes. Books by Bruno Vergnes Polymer Processing 2E Principles and Modeling by (author) Jean-François Agassant, Pierre Avenas, Pierre J. Carreau, Bruno Vergnes & Michel Vincent