Prediction of the release characteristics of alcohols from EVA using a model based on Fick's second law of diffusion

Krüger, Arnoldus J.; Tolmay, Andries T.

doi:10.1002/app.10333.abs

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is supposed here that the diffusion of the active for both water and acetone follows simple Fickian diffusion. Using the standard result for diffusion from a flat plate,26, 27 to which a disk can be approximated, the fraction F of active remaining at time t is given by where …”

Section: Resultsmentioning

confidence: 99%

Effect of inert fillers on diffusion and controlled release of penetrant in polymer matrices

Rajendran

Gilbert

Cribb

et al. 2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

This study investigates the characteristics of leaching into a solvent of an active used as termiticide, Bifenthrin 1 (a synthetic pyrethroid) entrapped in polymer, and the effect of layered silicates on this diffusion. Two contrasting solvents, water and acetone, were used to understand this phenomenon; the active is soluble in acetone but has very low solubility in water. The data are used to understand the migration characteristics of Bifenthrin when encapsulated in polyurethane to form a termite barrier. The absorption characteristics of Bifenthrin in polyethylene were also studied for comparison. Bifenthrinpolyurethane blends containing 0, 0.5, and 5% of layered silicates were prepared and monitored for the release of Bifenthrin. Using the time-concentration dependence of the active in polymer, diffusion coefficients of Bifenthrin from the polymer were inferred assuming Fickian diffusion. The presence of silicates had no significant effect on the diffusion behavior.

show abstract