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Author: tinh nguyen

Displaying records 71 to 80 of 104 records.
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71. 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

72. 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

73. 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

74. 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

75. 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

76. 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

77. 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

78. 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

79. 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

80. Fatigue Model for Fiber-Reinforced Polymeric Composites in Civil Engineering Applications
Published: 5/1/2000
Authors: Hai C. Tang, Tinh Nguyen, Joannie W Chin, J Lesko, Tze J Chuang
Abstract: A fatigue model based on cumulative damage is developed for predicting the fatigue life of fiber-reinforced polymeric composites in offshore applications. This model incorporates applied maximum stress, stress amplitude, loading frequency, residual ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151356



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