Results 131 to 140 of about 596 (178)
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Hygrothermal aging of an adhesive reinforced with microparticles of cork
Journal of Adhesion Science and Technology, 2015In the present study, natural microparticles of cork are used with the objective to increase the toughness of a brittle epoxy adhesive. The cork particles act as a crack stopper, leading to more energy absorption. This fact occurs because cork presents a remarkable combination of properties (low density, low cost and sustainability of the raw material).
Andreas Oechsner, L F M da Silva
exaly +3 more sources
Journal of Membrane Science, 2009
The membrane durability is a critical issue for the development of Proton Exchange Membrane Fuel Cells (PEMFC). Since PEMFC in situ tests were not conclusive to determine Nafion (R) membrane degradation mechanism, ex situ aging tests were performed on Nafion (R) 112 in practical fuel cell usage conditions.
Collette, F. M. +3 more
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The membrane durability is a critical issue for the development of Proton Exchange Membrane Fuel Cells (PEMFC). Since PEMFC in situ tests were not conclusive to determine Nafion (R) membrane degradation mechanism, ex situ aging tests were performed on Nafion (R) 112 in practical fuel cell usage conditions.
Collette, F. M. +3 more
openaire +2 more sources
AIP Conference Proceedings, 2010
Polyamides are moderately polar polymers absorbing significant amounts of moisture in wet environments. As an example, PA 6,6 uptakes more than 8% by weight of moisture at ambient temperature in 100% RH. In addition, amide is a well‐known hydrolysable group. It is thus suspected that such a polymer perishes by hygrothermal degradation.
Chaker El Mazry +5 more
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Polyamides are moderately polar polymers absorbing significant amounts of moisture in wet environments. As an example, PA 6,6 uptakes more than 8% by weight of moisture at ambient temperature in 100% RH. In addition, amide is a well‐known hydrolysable group. It is thus suspected that such a polymer perishes by hygrothermal degradation.
Chaker El Mazry +5 more
openaire +1 more source
Hygrothermal aging of a filled epoxy resin
2007 IEEE International Conference on Solid Dielectrics, 2007The hygrothermal conditioning of an epoxy resin at 80degC under 80% RH has been followed by weight measurements, therm ogravimetric analysis (TGA) and dynamical mechanical analysis (DMA). The samples are either filled with 60% by weight of silica flour or are not filled.
E. Brun +4 more
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Hygrothermal Aging Effects in Cured Epoxies
British Polymer Journal, 1986AbstractThe effect of relatively severe hygrothermal aging on the sorption and also the diffusion of water at 40°C has been studied for a number of epoxy networks comprising tetraglycidyl 4,4′‐diaminodiphenyl methane, and the curing agent 4,4′‐diaminodiphenyl sulphone, 4,4′‐diaminodiphenyl methane and 2,2′‐dichloro‐4,4′‐diaminodiphenyl methane.
James A. Barrie +3 more
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Hygrothermal ageing of epoxy based coatings
Journal of Materials Science, 1982Water sorption kinetics, and equilibria at different temperatures, and mechanical tests have been performed on different epoxy based coatings. The resins show different water transport properties and consequently different mechanical properties of the wet system, depending on the temperature and formulation.
CARFAGNA, COSIMO +2 more
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Effect of Hygrothermal Aging on Polyetherimide Composites
Journal of Reinforced Plastics and Composites, 2007The aim of this study is to investigate the effect of hygrothermal aging on both the static and thermo-mechanical behavior of polyetherimide composites. Tensile testing and dynamic mechanical thermal analysis were performed on the hygrothermally aged polyetherimide composites in the climatic cabin. The decrease in the T
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Durability of GFRP nanocomposites subjected to hygrothermal ageing
Composites Part B: Engineering, 2015Abstract This paper presents long term durability prediction of 0–5 wt.% nanoclay/vinylester/glass fibre nanocomposites based on their tensile strength retention in accelerated hygrothermal ageing using Arrhenius rate model. The specimens were exposed to 30 °C, 50 °C and 60 °C and 95% relative humidity for 75 days and tested for tensile strength ...
Salim Firdosh +5 more
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Moisture absorption and hygrothermal aging in a bismaleimide resin
Polymer, 2001Moisture diffusion in a BMI resin has been investigated by submerging thin specimens in water. The weight gain of the neat resin deviates significantly from Fick's law in that the uptake continues to slowly increase over an extended time scale. A two-stage diffusion model can successfully fit the experimental data.
Li-Rong Bao +2 more
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Investigations on hygrothermal aging of thermoplastic polyurethane material
Materials & Design, 2009Abstract In this investigation, the absorption and diffusion of water in thermoplastic polyurethane (TPU) was studied. Water-sorption experiments, physical and mechanical property tests were performed after immersion in water at a set temperature of 70 °C for up to 6 months.
A. Boubakri +3 more
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