COLL 107 |
| Nobuo Maeda, Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106, Nianhuan Chen, Department of Chemical Engineering, University of California, 3357 Engineering II, Santa Barbara, CA 93106, Haining Ji, Chemistry Department, University of Alabama, 901-14th Street South, Rm 201, Birmingham, AL 35294, Jimmy W. Mays, Department of Chemistry, University of Tennessee, Buelher Hall 655, Knoxville, TN 37996, Matthew V. Tirrell, Departments of Chemical Engineering and Materials, University of California, Dean's Office, College of Engineering, Santa Barbara, CA 93106, and Jacob Israelachvili, Department of Chemical Engineering and Material Science, University of California, Santa Barbara, Santa Barbara, CA 93106. |
| Polymers are often used as adhesive and lubricant coatings to produce both high and low adhesion or friction. Characterization of tribological and adhesive properties of polymers has therefore been of great interest for many years. Our recent work suggested that both adhesion and friction of such polymeric films are very sensitive to the physical state of the outermost layers, with interpenetration of the polymer chains (or chain segments) across the contacting interface being a major factor. Thus crosslinked polymer surfaces exhibit smooth and small friction and adhesion whereas finely scissioned polymer surfaces exhibit large friction and adhesion. We present some recent development of the work, namely the characterization of the crosslinking and scission procedures, complementary experiments using series of polymers of different molecular weight, and preliminary results using end-functionalized polymers. |
|
Friction, Lubrication, and Adhesion in Micro- and Nano-Scale Devices
8:30 AM-12:00 PM, Monday, March 29, 2004 Marriott -- Orange County 5, Oral
Division of Colloid and Surface Chemistry |