Investigation of solvents permeation through a multi-layer bottle andProposing a New Method for Determining Solvent Permeability

Multi-layer polyethylene bottles with a poly(ethylene-co-vinyl alcohol)EVOH barrier layer are used in agriculturalpesticide packaging. Given the importance of preventing the permeation of pesticides through the bottle, thepresence of a barrier layer like EVOH in these bottles is essential. The solvent systems used in this industrysometimes comprise a mixture of solvents and co-solvents, which can result in reduced efficiency of these bottlesin retaining pesticides. Consequently, to prevent leakage of the pesticides from these bottles, determining the solventpermeation rate is inevitable. In this paper, in addition to examining the permeation rate of pure solvents and thesolvent mixture from multi-layer bottles, a new method based on measuring the the Electrochemical ImpedanceSpectroscopy by solvent permeation from the EVOH layer is introduced. The results show that using the newmethod can significantly reduce the time required to evaluate the barrier layer's efficiency against the solvent

کلیدواژه ها:

Characterization polymer alloy ، permeability ، impedance ، multi-layer bottles