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Author: tinh nguyen

Displaying records 71 to 80 of 99 records.
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71. 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 ...

72. 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 ...

73. 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 ...

74. 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 ...

75. Mapping Polymer Heterogeneity Using Atomic Force Microscopy Phase Imaging and Nanoscale Indentation
Published: 4/1/2000
Authors: D T Raghavan, Xiaohong Gu, Tinh Nguyen, Mark R VanLandingham, Alamgir Karim
Abstract: Polymer coatings contain degradation-susceptible regions, and corrosion of metallic substrate can occur directly underneath these regions. In this paper, the microstructure of model coating materials is investigated using atomic force microscopy (AFM ...

76. Estimation of Absorbed Photolytic Dosage and Quantum Yields Using UV-Vis and FTIR spectroscopies
Published: 3/1/2000
Authors: Jonathan W. (Jonathan W.) Martin, Tinh Nguyen, E Byrd, N Embree
Abstract: An effective dosage model has been introduced for predicting the service life of polymeric materials exposed to UV light. The effective dosage model, which relates material damage through the apparent quantum yield, has a firm basis in the priciples ...

77. C-30 Self-Assembled Monolayers on Silica, Titania, and Zirconia: Hplc Performance, Atomic Force Microscopy, Ellipsometry, and Nmr Studies of Molecular Dynamics and Uniformity of Coverage
Published: 1/1/2000
Authors: M. Pursch, David Lloyd VanderHart, L C Sander, X H Gu, Tinh Nguyen, Stephen A Wise, Donald A. Gajewski

78. Mapping Polymer Heterogeneity Using Atomic Force Microscopy Phase Imaging and Nanoscale Indentation
Published: 1/1/2000
Authors: D T Raghavan, Xiaohong Gu, Tinh Nguyen, Mark R VanLandingham, Alamgir Karim

79. Model of Fatigue Damage in Strain Rate-Sensitive Composite Materials
Published: 1/1/2000
Authors: S K Lee, Tinh Nguyen, Tze J Chuang
Abstract: A Fatigue damage accumulation model based on the Paris law has been proposed for strain rate-sensitive polymer composite materials. A pre-exponent factor c^d2^/f and strain-rate sensitive exponent n is introduced. Numerical analysis of the model ha ...

80. Characterization of Multi-Phase and Multi-Component Polymer Systems Using the Atomic Force Microscope
Published: 8/1/1999
Authors: Mark R VanLandingham, Xiaohong Gu, D T Raghavan, Tinh Nguyen
Abstract: Recent advances have been made on two fronts regarding the capability of the atomic force microscope (AFM) to characterize the mechanical response of polymers. Phase imaging with the AFM has emerged as a powerful technique, providing contrast enhanc ...

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