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Author: tinh nguyen

Displaying records 61 to 70 of 97 records.
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61. 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

62. 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

63. 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

64. 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

65. 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

66. 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

67. 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

68. Effects of Relative Humidity on Photodegradation of Acrylic Melamine Coatings: A Quantitative Study
Published: 8/1/2000
Authors: Tinh Nguyen, Jonathan W. (Jonathan W.) Martin, E Byrd, N Embree
Abstract: Service life prediction methodology based on correlating short-term performance with outdoor data is not a fundamentally sound approach because the weather never duplicates itself. Experiments having over 200 different combinations of exposure condit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860279

69. Mapping Chemically Heterogeneous Polymer System Using Chemical Modification and Atomic Force Microscopy
Published: 8/1/2000
Authors: D T Raghavan, Tinh Nguyen, Mark R VanLandingham, Xiaohong Gu
Abstract: Polymer coatings are heterogeneous and often contain nanoscale degradation -susceptible regions. Therefore, mapping and identification of these regions would provide essential information for understanding the mechanism of the degradation of polymeri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860235

70. Temperature Effects on Fatigue of Polymer Composites
Published: 7/1/2000
Authors: Hai C. Tang, Tinh Nguyen, Tze J Chuang, Joannie W Chin, Hanchang F Wu, J Lesko
Abstract: Fiber-reinforced polymeric composites provide lightweight, high strength, and corrosive resistance to severe environmental exposures. These composites have been extensively used in aerospace and military application over the last three decades an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151463