Emerald Polymer Additives, a business group of Emerald Performance Materials, has named John Zuppo a president of its Polymer Additives and Nitriles business group. Zuppo will report to the executive committee of the Emerald Board of Directors.   Zuppo has been serving the Emerald’s Polymer Additives and Nitriles business group over the last five years, most recently as commercial vice president. During his tenure, Zuppo was instrumental building a more market-focused commercial organization, ...