(550f) A Polymer Isolation Process for Powders with Designed Properties

Most polymer process development programs for new products focus on molecular structure to achieve desired product properties.  This relationship tends to lead to a reaction focus for polymer process development.  There are cases where the final properties of the polymer powder also determine its functionality in a final product.  This is the case for polymer additives used for advanced composites.  A new process for producing fine, porous engineering thermoplastic powders has been developed for a range of these applications.  The powder formation process determines the functionality and desirability of the powder and leads to powders with unique properties.

This paper will focus on some of the key chemical engineering aspects of the process conditions that can be used to tailor properties such as porosity and particle size distribution.  Such changes can enable or enhance product performance.  Process alternatives for powder production will be presented and contrasted.  A two-fluid atomization process and its applicability to tailored polymer powders will be described. A review of applications and desired product characteristics will be discussed.