Effect of aging temperature on a thermoset-like novel acrylic thermoplastic composite for marine vessels

Abstract

This work aims at evaluating the durability of a carbon fibre reinforced thermoplastic composite under different aging conditions. The absorption and desorption of deionised water in carbon fibre (CF) reinforced Elium composite material were measured gravimetrically over two different temperatures. Water uptake experimental data were fitted to a Langmuir type diffusion model in order to identify and compare diffusion parameters and kinetics and to evaluate their dependence to aging conditions. It was found that the temperature increase had a significant effect only on saturation water uptake. Water desorption after aging was modelled accurately using Fick’s law and slight differences were found between model parameters. The effect of hydrothermal aging conditions and their reversibility were then evaluated by static and vibratory mechanical analysis. Results showed a slight and quasi-reversible reduction of longitudinal properties compared to shear properties at moderate aging temperature. While for higher aging temperature, the impact was found to be more significant and permanent on mechanical in-plane properties. Furthermore, static and modal results are confirmed by dynamic mechanical analysis, where the behaviour of studied material is differently affected by aging temperature, with a considerable increase in dried materials glass transition temperature.

Effect of seawater aging on the erosive wear response of aramid fiber reinforced composites

“…The accelerated aging process begins by immersing the samples of the different laminated composites in a thermostatic bath of saline water (COLE PARMER) at a temperature, that should be below the glass transition temperature of the composites, 29 which for this work was 70°C. 26,30,31 In specific periods of time, the samples were removed from the thermostatic bath, dried with absorbent paper, and weighed in the analytical balance. This process was repeated at different immersion times until moisture saturation was reached in the samples in a total of 1122 h. To determine the percentage of moisture absorbed by the different samples, the equation (1) was used.…”

Influence of environmental conditioning on mechanical properties of carbon dry fibre preformed thermoplastic matrix composites manufactured via automated placement-resin infusion process

“…In the present work the samples were aged for one month and three months in deionised water. Various studies indicate that degradation rate is higher in distilled water compared to seawater for polymers and composites in terms of diffusion rate and mechanical properties [26][27][28]. This was the motivation to select deionised water.…”

Influence of hygrothermal ageing on the novel infusible thermoplastic resin reinforced with quadriaxial non-crimp glass fabrics

“…18 The use of the Elium ® matrix for shipbuilding applications is still under development. 16,19 During the service life of marine composites, the composites maintain their mechanical properties. However, water absorption is inevitable as its presence may cause swelling, plasticization and debonding of fibres from the matrix, thereby shortening the service life composites.…”