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| Naji, M. |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Azam, Siraj |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Al-Maqdasi, Zainab
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Publications (11/11 displayed)
- 2024Characterization and Performance Evaluation of Lignin-Modified Epoxy Resin for Potential Use in Natural Fiber Reinforced Composites
- 2024Mechanical Performance of PE Reinforced with Graphene Nanoplatelets (GNPs): Effect of Composition and Processing Parameters
- 2024Effect of Thermomechanical Loading at Low Temperatures on Damage Development in Glass Fiber Epoxy Laminatescitations
- 2024Mechanical performance of pe reinforced with graphene nanoplatelets (GNPs) : Effect of composition and processing parameters
- 2023Time-dependent properties of high-density polyethylene with wood/graphene nanoplatelets reinforcementcitations
- 2022Does the viscoelastic behavior of fully cured epoxy depend on the thermal history during curing?citations
- 2022Multifunctionality and Durability of Cellulosic Fiber Reinforced Polymer Composites ; Multifunktionalitet och beständighet hos cellulosabaserade fiberkompositer
- 2021Conductive Regenerated Cellulose Fibers for Multi-Functional Composites : Mechanical and Structural Investigationcitations
- 2021Time‐dependent properties of graphene nanoplatelets reinforced high‐density polyethylenecitations
- 2019Conductive Regenerated Cellulose Fibers by Electroless Platingcitations
- 2018Wood Fiber Composites With Added Multi-Functionality
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article
Does the viscoelastic behavior of fully cured epoxy depend on the thermal history during curing?
Abstract
<jats:p> Residual strains and shape distortions in a polymer-based composite structure may depend on the cure schedule used for manufacture. Aiming to understand the cure history effects, the influence of the curing “path” (time [Formula: see text] and temperature [Formula: see text] path during curing) on viscoelastic (VE) response of a fully cured (FC) ([Formula: see text] = 0.992) epoxy was investigated. Five different “families” of the same epoxy were manufactured in constraint-free conditions using different sets of curing parameters. Then, tensile tests were performed at different temperatures (T = 30 to 110 °C), and the time–temperature superposition principle (TTSP) and Schapery’s type of linear viscoelastic (VE) model, accounting for physical aging of specimens tested at high temperature, were used. The results show that the VE properties of the studied epoxy are independent of the curing history provided that at the end all specimens are fully cured. Also, the physical aging rate at high temperatures of all “families” is the same and it can be described by a simple aging-temperature independent equation reported in Nunes et al.<jats:sup>1</jats:sup> It is expected that curing history of unconstrained and fully cured epoxy has an insignificant effect on final viscoelastic behavior, a knowledge which could assist in developing more time and cost-efficient cure cycles. </jats:p>