1. Department of Coatings and Polymeric Materials, North Dakota State University, Dept. 2510, P.O. Box 6050, Fargo, North Dakota 58108-6050, United States
2. Department of Chemistry and Biochemistry, North Dakota State University, Dept. 2508, P.O. Box 6050, Fargo, North Dakota 58108-6050, United States
3. Department of Mechanical Engineering, North Dakota State University, Dept. 2490, P.O. Box 6050, Fargo, North Dakota 58108-6050, United States
4. Combat Capabilities Development Command Army Research Laboratory, Aberdeen, Maryland 21005, United States