Free/bound water absorption in an epoxy adhesive

Popineau, Sylvain; Rondeau-Mouro, Corinne; Gaillet, Christine; Shanahan, M. E. R.

doi:10.1016/j.polymer.2005.09.008

Cited by 262 publications

(216 citation statements)

References 21 publications

Supporting

Mentioning

194

Contrasting

Unclassified

Order By: Relevance

“…polymer polarity -i.e., to the presence of sites with hydrogen bonds along the polymeric chain [26] .…”

Section: Resultsmentioning

confidence: 99%

“…This model adds two new parameters, a and b These new parameters are related to the probability by unit of time that a water molecule at the free phase transforms into a bound molecule (α) or the probability by unit of time that a bound molecule becomes a free one (β) [26] . Taking into account the following boundary conditions [19] …”

Section: Carter-kibler Modelmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system

Pereira

d’Almeida

2016

Polímeros

View full text Add to dashboard Cite

SbstractThe water absorption behavior of the DGEBA/TETA epoxy system was evaluated as a function of the epoxy monomer to amine hardener ratio. Weight gain versus immersion time curves were obtained and the experimental points were fitted using Fickian and Non-Fickian diffusion models. The results obtained showed that for all epoxy monomer to hardener ratios analyzed water diffusion followed non-Fickian behavior. It was possible to correlate the water absorption behavior to the macromolecular structure developed when the epoxy/ hardener ratio was varied. All epoxy/hardener ratios present a two-phase macromolecular structure, composed of regions with high crosslink density and regions with lower crosslinking. Epoxy rich systems have a more open macromolecular structure with a lower fraction of the dense phase than the amine rich systems, which present a more compact two-phase structure.

show abstract

“…polymer polarity -i.e., to the presence of sites with hydrogen bonds along the polymeric chain [26] .…”

Section: Resultsmentioning

confidence: 99%

Section: Carter-kibler Modelmentioning

confidence: 99%

Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system

Pereira

d’Almeida

2016

Polímeros

View full text Add to dashboard Cite

show abstract

“…This indicates that the absorption reaches quasi-equilibrium condition. The water absorption will recommence after quasi-equilibrium [15]. However, water molecules can only stay in micro-voids and form clusters.…”

Section: Sample Characterizationmentioning

confidence: 99%

Water absorption of epoxy/glass fiber/organo-montmorillonite nanocomposites

Chow¹

2007

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. The epoxy/glass fiber/organo-montmorillonite (OMMT) nanocomposites were prepared by hand lay up method. In the previous work, the flexural and morphological properties of the epoxy/glass fiber/OMMT were studied. In this work, the epoxy nanocomposites were characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and water absorption tests. The exfoliation of OMMT in epoxy/glass fiber nanocomposites was detected by XRD. DSC results showed that the glass transition temperature (Tg) of epoxy was increased slightly in the presence of OMMT. Water uptake of epoxy was reduced by the addition of glass fiber and OMMT. The decrease of water absorption in epoxy is attributed to the increasing of tortuosity path for water penetration in the epoxy composites by the hybrid of glass fiber and OMMT.

show abstract

“…thus, dT g =dm w ranges between 685 K for T gd ¼ 80 C to 1770 K for T gd ¼ 270 C. This leads to a T g depression per percent (mass) of absorbed water that ranges from about 7 K for T gd ¼ 80 C to about 18 K for T gd ¼ 270 C. Analysis of NMR [13,19] or dielectric spectra [20,21] reveals, however, the coexistence of hydrogen-bonded and free water molecules. These latter could be present in clusters; in this case, they would not participate in polymer/water interactions.…”

Section: Physical Interactionmentioning

confidence: 99%

Thermomechanical and hygroelastic properties of an epoxy system under humid and cold-warm cycling conditions

Yagoubi

Lubineau

Saghir

et al. 2014

Polymer Degradation and Stability

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tIn this paper, we study the hygrothermal aging of an anhydride-cured epoxy under temperature and hygrometry conditions simulating those experienced by an aircraft in wet tropical or subtropical regions. Gravimetric and dimensional measurements were performed and they indicate that there are three stages in this aging process: the first one, corresponding to the early cycles can be called the "induction stage". The second stage of about 1000 cycles duration, could be named the "swelling stage", during which the volume increase is almost equal to the volume of the (liquid) water absorbed. Both the first and second stages are accompanied by modifications of the mechanical properties and the glass transition temperature. During the third ("equilibrium") stage, up to 3000 cycles, there is no significant change in the physical properties despite the continuous increase of water uptake. This can be explained by the fact that only physically sorbed water can influence physical properties.

show abstract

Free/bound water absorption in an epoxy adhesive

Cited by 262 publications

References 21 publications

Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system

Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system

Water absorption of epoxy/glass fiber/organo-montmorillonite nanocomposites

Thermomechanical and hygroelastic properties of an epoxy system under humid and cold-warm cycling conditions

Contact Info

Product

Resources

About