What is the range of values of Specific Surface and Porosity for PET?

13 August 2013 1 1K Report

I want to estimate the free medium path of gas particles crossing a porous layer made of PET. I am using a formula that accounts for the porosity and specific surface of the media where the particles are moving. I am aware that these two values are not absolute but depend on the PET manufacturing process, but I would like to have a range of examples.

Naveen KUMAR Acharya

porosity of gas like hydrogen and carbon dioxide is very low, if we express it in permeability its value for PET is nearly 0.04 barrer.

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