1. Composite Materials and Engineering Center, Washington State University, Pullman, Washington 99164; NSF Nanoscale Science and Engineering Center for High-Rate Nanomanufacturing, Department of Plastic Engineering, University of Massachusetts−Lowell, Lowell, Massachusetts 01854; and Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038