I want to use nafion or chitosan for one of my gas sensing projects. But I am looking for a polymer which does not react or absorb gases. Do nafion and chitosan absorb gases?
Yes. Both have the ability to absorb gases. The formed Nafion absorbs gases, hence its membrane application in fuel cells. Similarly, chitosan also has gas applications in membranes. My suggestion for non gas absorbing polymer will be a zeolite polymer composites. This is may help.