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Hygrothermal aging of flip-chip assembled MOEMS
Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT), 2017Low cost and miniaturized solutions for assembly of optical microelectromechanical systems (MOEMS) are critical for increased exploitation of optical sensors and devices in consumer applications. Examples of applications based on optical sensors and devices already near or on the market are auto-focus lenses and pico-projectors for mobile phones ...
Maaike M. Visser Taklo +8 more
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Accelerated Hygrothermal and UV Aging of Thermoplastic Polyurethanes
High Performance Polymers, 2008Thermoplastic polyurethanes (PU) were prepared from 4,4'-diphenyl methane diisocyanate (MDI), polyether polyol and 1,4 butane diol with and without a hindered amine light stabilizer (Tinuvin®-123) and UV absorber (Tinuvin®-400). The accelerated hygrothermal and UV aging were performed at different humidity and aging temperatures for 720, 1440, and 2160
R.N. Jana, H. Bhunia
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Hygrothermal Aging Effects on Buried Molecular Structures at Epoxy Interfaces
Langmuir, 2013Interfacial properties such as adhesion are determined by interfacial molecular structures. Adhesive interfaces in microelectronic packages that include organic polymers such as epoxy are susceptible to delamination during accelerated stress testing.
John N, Myers +4 more
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Stress relaxation of a polycarbonate blend after hygrothermal aging
Mechanics of Time-Dependent Materials, 2012This work has studied the competing effects of physical aging and moisture absorption on the relaxation behaviour of a polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) polymer blend after being subjected to both thermal and hygrothermal aging. Physical aging was simulated by thermal aging the blend at temperatures up to 80 ∘C which is below the ...
Mojtaba Haghighi-Yazdi +1 more
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Strength of Epoxy/Glass Interfaces after Hygrothermal Aging
The Journal of Adhesion, 2005ABSTRACT The stability of epoxy/glass interfaces subjected to hygrothermal aging was assessed using a fracture-mechanics approach. An epoxy system consisting of diglycidyl ether of bisphenol F cured with 2-ethyl-4-methyl-imidazole was bonded to borosilicate glass adherends that were treated with various types of adhesion promoters to provide a variety ...
Orasa Khayankarn +3 more
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Hygrothermal Aging Behavior of Fiber-Reinforced Composites
2019Composite materials are ideal for engineering applications such as aircraft, spacecraft, automobiles, ship structures, roofs, wall panels, fishing rods, tennis rackets, and even retrofitting of buildings and bridges due to their high strength-to-weight and stiffness-to-weight ratios.
Shishir Kumar Sahu, Manoj Kumar Rath
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Development of hygrothermal accelerated ageing cycles
2019The lack of durability assessment procedures directly applicable to thermal mortars motivated the development of durability assessment procedures. The combination of the analysis of existing procedures with hygrothermal simulation allowed the development of accelerated ageing hygrothermal cycles, applied to thermal rendering systems, taking into ...
Joana Maia, Nuno Ramos, R. Veiga
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Hygrothermal ageing and damage of sandwich composites
2015The aim of this work was to analyse the durability of sandwich panels with a honeycomb aluminium core and composites skins based on epoxy resin and carbon-glass fibres. Ageing tests have been developed and the mechanical properties after ageing were evaluated. In particular the specimens were edge-sealed on all sides to prevent the water ingress in the
CHIERUZZI, Manila +3 more
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Effect of Water Temperature on Hygrothermal Aging of GFRP Panel
1991This study deals with the effect of water temperature on the hygrothermal aging of a GFRP panel. Materials used in this study are two types of continuous E-glass fibre mat reinforced polyester which have different fillers. The specimens are immersed in hot water at 60°, 80° and 95° C and then weight changes and bending properties are measured.
Tohru Morii +6 more
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Hygrothermal Ageing of Glass Reinforced Composite Pipes
1999Structural applications of composite materials imply that a given structure is exposed to a complex loading spectrum over a long period of time. This loading spectrum can be both of a mechanical nature (dynamic, static or their combination) and of a non-mechanical origin associated with external environment such as temperature and concentration of ...
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