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Author: tinh nguyen

Displaying records 71 to 80 of 114 records.
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71. Mode, Mechanism and Model for Hydrolysis of Acrylic-Melamine Coatings in the Absence of UV Light
Published: 11/1/2001
Authors: Tinh Nguyen, Jonathan W. Martin, S Saunders, E Byrd
Abstract: rylic-melamine coatings are used extensively for automobile topcoat/base coat systems. However, these materials undergo hydrolysis when they are exposed to water or humid environments. The mode and mechanism of degradation and a physics-based model ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860368

72. Physical Degradation Of Polymeric Coating Surfaces Using Atomic Force Microscopy
Published: 11/1/2001
Authors: Mark R VanLandingham, M Giraud, Tinh Nguyen, Walter Eric Byrd, Jonathan W. Martin
Abstract: Atomic force microscopy (AFM) and Fourier Transform Infrared (FTIR) spectroscopy were used to monitor physical and chemical changes, respectively, in acrylic melamine coatings caused by exposure to a 50 C, 70 % relative humidity environment with and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860369

73. Characterization of Chemical Heterogeneity in Polymer Systems Using Hydrolysis and Tapping Mode Atomic Force Microscopy
Published: 7/1/2001
Authors: D Ragahavan, X. Gu, Tinh Nguyen, Mark R VanLandingham
Abstract: Characterization of polymer coatings microstructure is critical to the fundamental understanding of corrosion of coated metals. In this paper an approach for mapping chemical heterogeneity of a polymer system using chemical modification and tapping ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860312

74. Effects of Relative Humidity on Moisture-Enhanced Photolysis of Acrylic Melamine Coatings: A Quantitative Study
Published: 4/1/2001
Authors: Tinh Nguyen, Jonathan W. Martin, E Byrd, N Embree
Abstract: The effects of relative humidity ranging from [approximately equal to] 0 % to 90 % on the moisture-enhanced photolysis (MEP) of a partially-methylated melamine acrylic polymer coating exposed to the ultraviolet (UV)/50 degrees C condition have been i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860322

75. Effects of Water, Salt Solution and Simulated Concrete Pore Solution on the Properties of Composite Matrix Resins Used in Civil Engineering Applications
Published: 4/1/2001
Authors: Joannie W Chin, K Aouadi, M R. Haight, W Hughes, Tinh Nguyen
Abstract: One of the obstacles hindering the acceptance of polymer composites in civil engineering applications is the susceptibility of the polymeric matrix to degradation that is initiated by moisture, temperature, and corrosive chemical environments. The o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860212

76. Nanomechanical Measurements of Polymeric Systems
Published: 3/13/2001
Authors: Mark R VanLandingham, Christopher C White, Xiaohong Gu, Tinh Nguyen
Abstract: Durability, in terms of service life, is often related to the failure due to service conditions of an unacceptable percentage of a product population. In many cases, this percentage is much less than 1 %, and thus the factors affecting early times-t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860384

77. Characterization of Coating System Interphases With Phase Imaging AFM.
Published: 2/1/2001
Authors: Tinh Nguyen, Xiaohong Gu, M Giraud, M R VanLandingham, R Dutruc-Rosset, R Ryntz, D Nguyen
Abstract: The interphase between a polymer film and a substrate controls the adhesion and durability of a variety of polymeric systems including adhesives and coatings on plastics and metals. Interphase formation is affected by processing conditions that contr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916896

78. Characterization of Coating System Interphases with Phase Imaging AFM
Published: 2/1/2001
Authors: Tinh Nguyen, Xiaohong Gu, Mark R VanLandingham, M Giraud, R Dutruc-Rosset, R Ryntz, D Nguyen
Abstract: The interphase between a polymer film and a substrate controls the adhesion and durability of a variety of polymeric systems including adhesives, coatings on plastics and metals, and electronic packaging. A polymeric coating system consists of a coat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860326

79. Effects of Stoichiometry and Epoxy Molecular Mass on Wettability and Interfacial Microstructures of Amine-Cured Epoxies
Published: 2/1/2001
Authors: M Giraud, Tinh Nguyen, Xiaohong Gu, Mark R VanLandingham
Abstract: The effects of stoichiometry and epoxy molecular mass on surface and interfacial microstructures and wettability of amine-cured epoxies have been investigated. Thin (<50 nm) and thick (>150 m) amine-cured epoxy films were prepared by reacting epoxy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860318

80. Characterization of Chemical Heterogeneity in Polymer Systems Using Hydrolysis and Tapping-Mode Atomic Force Microscopy.
Published: 1/1/2001
Authors: Xiaohong Gu, Tinh Nguyen, D Raghavan, M R VanLandingham
Abstract: Characterization of polymer coatings microstructure is critical to the fundamental understanding of corrosion of coated metals. An approach for mapping chemical heterogeneity of a polymer system using chemical modification and tapping mode atomic for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916895



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