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Author: tinh nguyen

Displaying records 61 to 70 of 99 records.
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61. 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. (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

62. 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

63. Effects of Relative Humidity on Moisture-Enhanced Photolysis of Acrylic Melamine Coatings: A Quantitative Study
Published: 4/1/2001
Authors: Tinh Nguyen, Jonathan W. (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

64. 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

65. 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

66. 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

67. 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

68. Characterization of Polyester Degradation Using Tapping Mode Atomic Force Microscopy; 1. Exposure in Alkaline at Room Temperature
Published: 1/1/2001
Authors: Xiaohong Gu, D T Raghavan, Tinh Nguyen, Mark R VanLandingham, D Yebassa
Abstract: One of the major disadvantages of polyester materials is their sensitivity to hydrolysis. In this paper, tapping mode atomic force microscopy (AFM) has been used to examine the microstructure of polyester films before and after exposure to an alkali ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860313

69. Characterization of Heterogeneous Regions in Polymer Systems Using Tapping Mode and Force Mode Atomic Force Microscopy
Published: 11/1/2000
Authors: R Raghavan, Mark R VanLandingham, Xiaohong Gu, Tinh Nguyen
Abstract: Characterization of polymer coating surfaces is crucial to understanding and predicting the long-term performance of coatings in aggressive environments. The exposed polymer surface and near-surface regions can differ from the bulk polymer film both ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860238

70. Characterization of Polyester Degradation Using Tapping Mode Atomic Force Microscopy
Published: 8/1/2000
Authors: Xiaohong Gu, D T Raghavan, Tinh Nguyen, Mark R VanLandingham
Abstract: Tapping mode AFM was used to examine the microstructure of polyester films before and after exposure to an alkaline solution. Bright-colored microgel domains and dark-colored interstitial regions were observed in phase images of the unexposed sample ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860277



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