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Permeability is calculated by the formula P=D/S.

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+1 vote
in Food Packaging Technology by (63.0k points)
Permeability is calculated by the formula P=D/S.

(a) True

(b) False

This question was addressed to me in a national level competition.

My question comes from Diffusivity and Permeability in Plastics topic in portion Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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The correct choice is (b) False

To explain: Permeability is the multiplication of diffusion coefficient and solubility coefficient. P=D*S. P,D,S stands for Permeability coefficient, Diffusivity Coefficient and Solubility Coefficient respectively. It is because, vapour/gas solubilizes and then diffuses through the film to reach it’s other side.

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