Mark A. Spalding is a Fellow in the Materials & Parts Processing Group at The Dow Chemical Company, Midland, MI. He joined Dow in 1985 after completing a BS from The University of Toledo and a MS and PhD from Purdue University, all in Chemical Engineering. He has performed fundamental research in single-screw extrusion, developed methods to measure resin physical properties that are important to polymer processing, developed numerous techniques to troubleshoot and increase the rates of extrusion lines, and has developed new mathematical models for extrusion simulation. He co-authored the book "Analyzing and Troubleshooting Single-Screw Extruders" with Gregory A. Campbell. Dr. Spalding is a Fellow and Honored Service Member of the Society of Plastics Engineers (SPE).

Ananda M. Chatterjee started his career at Celanese Plastics (1978) and worked for Shell Development, Union Carbide, Dow Chemical, Kaneka Texas, and Ingenia Polymers. He had extensive and in-depth experience in polymer research and development, product commercialization, polymer film processing and products technology, polymer additives technology, additive blends technology and processing, customer technical service, intellectual property (patent) invention and licensing and technology transfer of UNIPOL polypropylene technology worldwide. He was a Fellow and Honored Service Member of the Society of Plastics Engineers (SPE). Dr. Chatterjee held a PhD from the University of Massachusetts Amherst and held over 25 U.S. patents. Dr. Chatterjee passed away in 2016 during the development of this book.