The influence of diffusion and chemical reaction on adsorption kinetics in binary surfactant systems

Foister, Robert T.

doi:10.1016/0021-9797(83)90042-5

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…In addition, ATR-FTIR was also used to successfully demonstrate the significant difference between the bulk and surface compositions. This work elucidates important mechanisms likely operating in prior studies [52,53,55,79,80,88] by providing an understanding of the impact of the secondary CO 2amine impact on the changing surface tension profile and the differences between the bulk and surface compositions.…”

Section: Discussionmentioning

confidence: 69%

“…Since this study explores the surface tension of an epoxyamine reaction, an indication of preferential migration of amine to the surface can be tested by adding small amounts of amine to the epoxy. [53,79,88,89] Small quantities of amine curing agent were added to the epoxy resin, stirred until well mixed and measured. Figure 2 presents these results, which demonstrate that a significant decrease in the surface tension is observed when small amounts of curing agent are added to the DGEBA resin.…”

Section: Static Surface Tension Measurementsmentioning

confidence: 99%

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Impact of carbamate formation on the surface tension of epoxy‐amine curing systems

Shenk

Benjamin

Winter

2023

Polymer Engineering & Sci

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Epoxy-amine reactive systems, including their surface tension, have been studied due to their use and importance in composites and adhesives in laboratory and industrial applications. Understanding how the system's surface tension changes during curing could help target applications for tailored composites.Using the Wilhelmy plate method, surface tensions for epoxy-curing agent systems were investigated under different environments. While the epoxy exhibited an expected negative temperature coefficient of À0.096 mN/m/ C, the curing agent exhibited a positive temperature coefficient of 0.073 mN/m/ C, which is due to the curing agent reacting with atmospheric CO 2 to form carbamate through a zwitterion pathway and functional groups accumulating at the surface of the reacting systems. Carbamate formation results in a surface tension below that of the individual constituents in the epoxy-amine curing agent system. Fourier transform infrared (FTIR) spectroscopy was used to verify in situ formation of carbamate, and by reducing the system's temperature, it was demonstrated that the system surface tension profiles displayed micellar surfactant-like characteristics. FTIR was used to explore the difference in composition between the surface and the bulk, in particular carbamate formation at the surface, resulting in a lowering of the surface tension of reacting systems.

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Section: Discussionmentioning

confidence: 69%

Section: Static Surface Tension Measurementsmentioning

confidence: 99%

Impact of carbamate formation on the surface tension of epoxy‐amine curing systems

Shenk

Benjamin

Winter

2023

Polymer Engineering & Sci

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Modification of polymer surface properties by inert and reactive surface‐active compounds

Rudoy¹,

Ogarev²

1991

Makromolekulare Chemie. Macromolecular Symposia

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General conditions of formation and dynamics of adsorption layer of inert surface‐active compounds at the polymer/gas interface were investigated. A quantitative model describing the behavior of surface‐active additive in polymer film during evaporation into gaseous phase was developed. The correctness of the model was demonstrated on the specific example of studying the behavior of fluoro‐organic compounds in polyethylene. The possibility of modifying surface properties of thermoreactive polymers by reactive surface‐active compounds was elucidated. It was found that the degree of epoxy polymer surface modification in systems made up of epoxy resin/monoepoxy ester of fatty acid is controlled by the ratio between the additive's rate of diffusion and the rate of its chemical reaction.

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Dynamic surface properties due to amine migration and chemical reaction in primary amine/epoxide systems

Foister

1984

Journal of Colloid and Interface Science

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The influence of diffusion and chemical reaction on adsorption kinetics in binary surfactant systems

Cited by 5 publications

References 24 publications

Impact of carbamate formation on the surface tension of epoxy‐amine curing systems

Impact of carbamate formation on the surface tension of epoxy‐amine curing systems

Modification of polymer surface properties by inert and reactive surface‐active compounds

Dynamic surface properties due to amine migration and chemical reaction in primary amine/epoxide systems

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