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Author: li piin sung

Displaying records 11 to 20 of 68 records.
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11. Effects of Temperature and Humidity on the Photodegradation of TiO2-Filled Acrylic Urethane Films
Published: 10/28/2009
Authors: Stephanie S Watson, Tarek Marray, Yongyan Pang, Li Piin Sung
Abstract: Metal oxide fillers, such as titanium dioxide (TiO2) are commonly used in building and construction applications and are added to increase the opacity and/or to improve the mechanics of a coating. However, their photoreactivity can contribute to deg ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904151

12. Mapping Heterogeneity in NanoTiO2/Polymer Coatings Using Confocal Microscopy and Depth Sensing Indentation
Published: 10/14/2009
Author: Li Piin Sung
Abstract: The purpose of this study is to develop relevant metrology to measure the appropriate structure-property relationship at a proper length scale to understand the interplay between nanoparticle and polymeric matrix. In this paper, we present the prelim ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904088

13. Effect of Nano-Silica Fillers on Surface Morphology and Mechanical Properties of Polymer-Silica Composites
Published: 8/20/2009
Authors: Li Piin Sung, Dongmei Zhe, Aaron M Forster, Peter Krommenhoek, Nancy J Lin, Sheng Lin-Gibson
Abstract: Investigation on the effect of nano-silica on the effect of nano-silica on the surface morphology and mechanical properties has been carried out on two-dimensional (2D) gradient polymer-silica composite samples varied in chemical composition (e.g., f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902248

14. Quantification of cell response to polymeric composites using a two-dimensional gradient platform
Published: 8/6/2009
Authors: Nancy J Lin, Haiqing Hu, Li Piin Sung, Sheng Lin-Gibson
Abstract: A simple and straightforward screening process to assess the toxicity and corresponding cell response of dental composites would be useful prior to extensive in vitro or in vivo characterization. To this end, gradient composite samples were prepared ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854040

15. Long-Term Performance of Nano-Filled Polymeric Materials: Effect of ZnO Nanoparticles on Photodegradation of a Waterborne Polyurethane Coating
Published: 7/8/2009
Authors: Xiaohong Gu, Dongmei Zhe, Minhua Zhao, Guodong Chen, Nhieu Ly, Paul E Stutzman, Li Piin Sung, Tinh Nguyen, Joannie W Chin
Abstract: Polymers are widely used as exterior coatings in buildings, bridges, aircrafts and automobiles for both protection and aesthetic purposes. However, the service life of the applied coatings is limited due to the photodegradation of polymers induced by ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902293

16. Characterizing the Dynamic Behavior of Nano-TiO2 Agglomerates in Suspensions by Photocorrelation Spectroscopy
Published: 4/22/2009
Authors: I-Hsiang Tseng, Stephanie S Watson, Li Piin Sung
Abstract: Metal oxide nanoparticles are small but easily form agglomerates in suspension, depending on the strength of particle-particle and particle-media interactions. To understand the agglomeration behavior of nanoparticles in media and relate to it to pro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902458

17. Combinatorial characterization of photopolymerizable composites: Effect of filler type and content on properties
Published: 3/22/2009
Authors: Li Piin Sung, Aaron M Forster, Haiqing Hu, Nancy J Lin, Sheng Lin-Gibson
Abstract: Multi-component formulations coupled with complex processing conditions govern the final properties of photopolymerizable dental composites. In this study, a single test substrate was fabricated to support multiple formulations with a gradient in deg ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900240

18. Effects of filler type and content on mechanical properties of photopolymerizable composites determined using a two-dimensional gradient platform
Published: 2/5/2009
Authors: Sheng Lin-Gibson, Li Piin Sung, Haiqing Hu, Aaron M Forster, Nancy J Lin
Abstract: Photopolymerizable dental composites have complex processing conditions and multi-component formulations that affect the final properties. Combinatorial screening is a useful approach for evaluating multiple properties of the composites. A single te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854081

19. Instrumented Indentation for Quantifying Quasi-static and Transient Properties of Polymeric Coatings
Published: 11/26/2008
Authors: Aaron M Forster, Peter Krommenhoek, Li Piin Sung, Chris A Michaels, Kurt Wood
Abstract: Instrumented indentation was used to investigate the mechanical properties of coatings for automotive and architectural applications. First, the mechanical properties in the cross-section of a multi-layer acrylic-melamine automotive coating subjected ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861664

20. Comparing Analytical Methods for Detecting and Characterizing Nanoparticles in Formulated Products
Published: 10/1/2008
Authors: Katherine M. Tyner, Anna M. Wokovich, William H. Doub, Lucinda F. Buhse, Li Piin Sung, Stephanie S Watson, Nakissa Sadrieh
Abstract: To understand the extent of consumer exposure to nanomaterials as well as how nanomaterials impact consumer goods, it is necessary to detect and characterize nanomaterials in unmodified final products. Although there are pathways to characterize nano ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861604



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