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Author: li piin sung

Displaying records 41 to 50 of 70 records.
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41. USE OF LASER SCANNING CONFOCAL MICROSCOPY FOR QUANTITATIVE CHARACTERIZATION OF PHYSICAL CHANGES OF POLYMER COATINGS AFTER UV EXPOSURE
Published: 10/1/2004
Authors: Li Piin Sung, J Jasmin, Xiaohong Gu, Tinh Nguyen, Jonathan W. Martin
Abstract: Due to its non-destructive properties, laser scanning confocal microscopy (LSCM) has become a powerful tool for monitoring physical changes in polymeric coatings following ultraviolet (UV) radiation exposure. Physical changes caused by UV exposure i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860531

42. Effect of Microstructure of Fluorinated Acrylic Coatings on UV Degradation Testing
Published: 9/1/2004
Authors: Li Piin Sung, Silvia Vicini, D L Ho, L Hedli, C Olmstead, Kurt Wood
Abstract: This paper presents research results on the relationships between the microstructure and the performance/weatherability of fluoropolymer/acrylic coatings. We studied fluoropolymer/acrylic blends of identical composition, prepared as films using three ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860597

43. Advanced Techniques for Nanocharacterization of Polymeric Coating Surfaces
Published: 7/1/2004
Authors: Xiaohong Gu, Tinh Nguyen, Li Piin Sung, Mark R VanLandingham, Y C Jean, Jonathan W. Martin
Abstract: The applications of AFM and nanoindentation on study of surface property of polymeric coatings have been demonstrated. The surface microstructure of several coatings was characterized using tapping mode AFM, and the morphological change of coatings d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860520

44. Finite-Size Effects on Surface Segregation in Polymer Blend Films Above and Below the Critical Point of Phase Separation
Published: 3/1/2004
Authors: H Grull, Li Piin Sung, Alamgir Karim, Jack F Douglas, Sushil K. Satija, Makoto Hayashi, H Jinnai, TT Hashimoto, Charles C. Dr. Han
Abstract: We investigate the influence of temperature and confinement on surface segregation in thin films of deuterated polybutadiene and polyisoprene near the critical point for phase separation. Neutron reflectivity measurements show that polyisoprene enri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852233

45. Advanced Techniques for Nanocharacterization of Polymeric Coating Surfaces
Published: 1/1/2004
Authors: X H Gu, T Y Wu, Tinh Nguyen, Li Piin Sung, Mark R VanLandingham, Michael J Fasolka, Jonathan W. Martin, Y C Jean, D Nguyen, N K Chang
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853954

46. Suppression of Phase Separation Pattern Formation in Blend Films With Block Copolymer Compatibilizer
Published: 7/1/2003
Authors: Li Piin Sung, Jack F Douglas, Charles C. Dr. Han, Alamgir Karim
Abstract: We show that the addition of a small concentration of a block copolymer surfactant to a thin phase separating blend film can suppress the pattern formation that occurs in the blend films without block copolymer. This effect is observed even at very ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852060

47. Suppression of Surface Pattern Formation in Blend Films With Block Copolymer Surfactant
Published: 7/1/2003
Authors: Li Piin Sung, Jack F Douglas, Charles C. Dr. Han, Alamgir Karim
Abstract: We show that the addition of a small concentration of a block copolymer surfactant to a thin phase separating blend film can supppress the pattern formation that occurs in the blend films without block copolymer. This effect is obseved even at very ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851867

48. Modification of Thin Film Phase Separation by a Surfactant
Published: 3/25/2003
Authors: Li Piin Sung, Alamgir Karim, Jack F Douglas, Charles C. Dr. Han
Abstract: Phase separation in thin films leads to the formation of surface patterns (holes, bumps, and bicontinuous surface features) which depend on the film composition. These features are interpreted to arise from surface tension variations within the film ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851518

49. Surface and Interface Properties of UV-Exposed PVDF/PMMA-CO-PEA Blends
Published: 3/5/2003
Authors: Xiaohong Gu, Li Piin Sung, D L Ho, Chris A Michaels, D Nguyen, Y C Jean, Tinh Nguyen
Abstract: The surface and interface of PVDF blended with different amounts of poly (methyl methacrylate) and poly (ethyl acrylate) copolymer (PNMA-co-PEA) have been investigated before and after exposure to UV light. Dry free films having athickness of approx ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860474

50. Characterization of Metal-Oxide Nanoparticles: Synthesis and Dispersion in Polymeric Coatings.
Published: 1/1/2003
Authors: Li Piin Sung, Derek L. Ho, S Scierka, M Baghai-Anaraki
Abstract: Applications for using metal-oxide nanoparticles to optimize UV absorption and to enhance the stiffness, toughness, and service life of polymeric materials become advantageous. To achieve the optimal material properties of those metal-oxide nanoparti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916899



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