The interface region in glass fibre-reinforced epoxy resin composites: 2. Water absorption, voids and the interface

Thomason, James

doi:10.1016/0010-4361(95)96805-g

Cited by 170 publications

(116 citation statements)

References 16 publications

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“…13,14,15 Dynamic mechanical analysis has also proved to be useful in studying the interfacial properties of laminated epoxy-glass composite samples. 16,17,18,19 Much of this research has centered on qualitative changes in the T g or tan ␦ signal. It appears that no articles have been published that use cooperativity plots to characterize the interfacial properties of composite materials.…”

Section: Discussionmentioning

confidence: 99%

Characterization of epoxy-surfactant interactions

Jensen

O'Brien

Wang

et al. 1998

J. Polym. Sci. B Polym. Phys.

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Section: Discussionmentioning

confidence: 99%

Characterization of epoxy-surfactant interactions

Jensen

O'Brien

Wang

et al. 1998

J. Polym. Sci. B Polym. Phys.

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“…Water absorption in polymers and composites is normally analysed against the square root of exposure time to enable the use of standard diffusion models (18,19). Figure 6 shows such a plot of percentage increase in sample weight of both tensile dogbone and impact bars for composites A and B and the resin only sample after hydrolysis at 120°C.…”

Section: Resultsmentioning

confidence: 99%

“…Moisture absorption related processes in polymers and composites are normally analysed against the square root of exposure time (18,19) and we have followed this procedure in the Figures which are presented here. Error bars in these Figures represent the 95% confidence interval on the average value presented.…”

Section: Resultsmentioning

confidence: 99%

Structure–property relationships in glass‐reinforced polyamide, Part 3: Effects of hydrolysis ageing on the dimensional stability and performance of short glass–fiber‐reinforced polyamide 66

Thomason

2007

Polymer Composites

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This version is available at https://strathprints.strath.ac.uk/5799/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.Structure-property relationships in glass reinforced polyamide: 3) Effects of hydrolysis ageing on the dimensional stability and performance of short glass-fibre reinforced Polyamide 66. J. L. Thomason AbstractWe present results on an in-depth study of the effects of hydrolysis testing on the mechanical performance, weight change, and dimensional stability of injection moulded glass-fibre reinforced polyamide 66 based on two chopped fibre products with different sizing formulations. Composite and resin samples have been characterised both dry as moulded and after conditioning at either 120°C or 150°C for a range of times up to 1000 hours. The results reveal that hydrothermal ageing in water-glycol mixtures results in significant changes in the mechanical performance, weight, and dimensions of these materials. The negative effects of conditioning could be mitigated to some degree by the appropriate choice of the glass fibre sizing; however the sizing effect diminished with increasing conditioning time. All materials showed a weight increase due to conditioning at 120°C which was typical of a single Fickian diffusion process and there was clear evidence of multiple processes involved when conditioning at 150°C. It was not apparent that the glass fibre sizing affected the dimensional stability of the composites. We show that there is a strong correlation between the swelling of these samples and the level of fluid adsorption. Although the PA66 resin showed reasonably homogeneous swelling, the composites exhibited different levels of swelling depending on direction. These effects were well in line with the known effects of fibres on restriction of the matrix deformation (mechanical, thermal or moisture swelling) in the fibre direction. These differences correlate well with the average fibre orientation with respect to t...

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“…[1][2][3][4] In a FRP composite, the polymer matrix may be plasticized and/or degraded, the interface could be weakened, and the fibers themselves could also be attacked by moisture. However, there is little information available in the literature on the sorption and transport behavior of water, salt water, and alkaline solutions in the composite as well as in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Sorption and diffusion of water, salt water, and concrete pore solution in composite matrices

Chin

Nguyen

Aouadi

1999

J. Appl. Polym. Sci.

137

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ABSTRACT:In recent years, the use of fiber-reinforced polymer composites in civil infrastructure has been promoted as a solution to the deterioration of bridges, buildings, and other structures composed of traditional materials, such as steel, concrete, and wood. Any application of a polymer composite in an outdoor environment invariably involves exposure to moisture. There is also potential for exposure to saline conditions in waterfront or offshore structures, and alkaline environments, as would be encountered by a reinforcing bar in a cementitious material. This study characterizes the sorption and transport of distilled water, salt solution, and a simulated concrete pore solution in free films of vinyl ester, isophthalic polyester (isopolyester) and epoxy resins, all commercially important materials for use in structural composites. Diffusion of all three liquids in each of the three materials was observed to follow a Fickian process. Mass loss was observed for the isopolyester in salt water and concrete pore solution at 60°C, suggesting hydrolysis that was accelerated by the high temperature exposure. Both the rate of uptake, as well as the equilibrium uptake, were greater at 60°C, compared with ambient conditions. Diffusion coefficients calculated from the mass uptake data revealed that, although the epoxy resin had the highest equilibrium uptake, it had the lowest diffusion coefficient.

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The interface region in glass fibre-reinforced epoxy resin composites: 2. Water absorption, voids and the interface

Cited by 170 publications

References 16 publications

Characterization of epoxy-surfactant interactions

Characterization of epoxy-surfactant interactions

Structure–property relationships in glass‐reinforced polyamide, Part 3: Effects of hydrolysis ageing on the dimensional stability and performance of short glass–fiber‐reinforced polyamide 66

Sorption and diffusion of water, salt water, and concrete pore solution in composite matrices

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