Dynamic mechanical investigations of the effects of water sorption and physical ageing on an epoxy resin system

Colombini, Didier; Martinez‐Vega, Juan; Merle, G.

doi:10.1016/s0032-3861(02)00272-0

Cited by 44 publications

(39 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to make better polymers with higher protection capacity it is important to understand the underlying relationship between the polymer structure and the diffusion of small molecules. A number of experimental and simulation studies have been devoted to understand the moisture transport inside epoxy polymers [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. However the molecular level understanding of the moisture induced plasticization effects are still an area of interest to many industrial processes.…”

Section: Introductionmentioning

confidence: 99%

A molecular dynamics study of water transport inside an epoxy polymer matrix

Pandiyan

Krajniak

Samaey

et al. 2015

Computational Materials Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A molecular dynamics study of water transport inside an epoxy polymer matrix

Pandiyan

Krajniak

Samaey

et al. 2015

Computational Materials Science

View full text Add to dashboard Cite

“…It could be related to the formation of covalent bond between silica surface and the matrix to form chemical bonds [13]. Increasing of Tg and decreasing of the free volume may be related to crosslinking of polymer.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

“…Besides, the existence of hydrogen-bonding sites is a main factor in the polymer-water affinity along the polymer chains, which produces attractive forces between the polymer and the water molecules [13].…”

Section: The Influence Of Hydrothermal Ageing On Dynamic Mechanical Amentioning

confidence: 99%

See 1 more Smart Citation

The effects of water absorption and surface treatment on mechanical properties of epoxy nanocomposite using response surface methodology

et al. 2013

View full text Add to dashboard Cite

In this study, the dynamic-mechanical properties of fumed silica and silane-treated reinforced epoxy nano-composites were examined; silane-treated specimens demonstrated greater glass transition temperature, modulus, and less moisture absorption. An epoxy composite has been studied under hydrothermal ageing in order to investigate the effect of treatment on dynamical mechanical thermal analysis. The nanocomposites were kept in seawater up to 600 h. The process was then modeled using response surface methodology based on central composite design (CCD). Three models were developed to predict the influence of wet aging parameters on the Tg, modulus, and damping. Accuracy of predicted results was analyzed by the analysis of variance method. The optimum values predicted by the RSM and CCD were 1 % wt treated fumed silica followed by aging at 60°C. Multiple correlation coefficients (R 2 ) of 0.96 were obtained from the regression models for Tg, confirming the good accuracy of developed models.

show abstract

“…Epoxy coatings have an affinity with water because of polar hydroxyl groups created by the epoxide ring-opening reaction with primary and secondary amines. 6 Water existing in epoxy coatings has been classified as hydrogen-bonded water or free water in pores. However, in this study the types of water and the forms of water-polymer interaction will not be discussed separately.…”

Section: Introductionmentioning

confidence: 99%

Environmental and time dependence of moisture transportation in an epoxy coating and its significance for accelerated weathering

2009

View full text Add to dashboard Cite

It is increasingly appreciated that water is one of the most important factors in the durability behavior of coatings. The rate of water transportation and the degree of saturation of polymeric coatings depends on exposure history, exposure environment, and the nature of a coating. The focus here is on the time taken for transport of water and the variation it causes in thermal and mechanical properties, which have also been shown previously to have time-dependence that leads to discrepancies between different weathering regimes. This paper studied the effect of moisture on coatings' mechanical properties and the effect of moisture and temperature on recovery of surface indentation. The reduction of mechanical properties and the increasing rate of surface defect relaxation can be explained in terms of plasticization by water. Recovery of surface defects is related to the appearance and diffusion activity of coatings during exposure. Thermogravimetric analysis showed that the content of moisture in the sample is determined by the ambient humidity, temperature, and the rate of change in these environmental parameters. Diffusion coefficients were determined from the weight change data and an activation energy was obtained via Arrhenius equation. Changes in yellowness, as an example, and signature of chemical degradation, indicated that the cycling period in accelerated weathering may affect the degradation via the amount and distribution of moisture in coatings. Diffusion of moisture is typically slow and limits the possibility of complete drying or saturation in an exposure cycle. Results from the cumulative effect of many cycles will be different depending on the conditions.

show abstract

Dynamic mechanical investigations of the effects of water sorption and physical ageing on an epoxy resin system

Cited by 44 publications

References 31 publications

A molecular dynamics study of water transport inside an epoxy polymer matrix

A molecular dynamics study of water transport inside an epoxy polymer matrix

The effects of water absorption and surface treatment on mechanical properties of epoxy nanocomposite using response surface methodology

Environmental and time dependence of moisture transportation in an epoxy coating and its significance for accelerated weathering

Contact Info

Product

Resources

About