12 November 2018 0 10K Report

Hello,

I am spin coating PDMS onto porous LDPE. However, when I test the permeability to air, it shows a low permeance rate. My method is as follows:

-Dissolve Sylgard base and curing agent in toluene as 20 wt.% solution

-degass solution

- spin coat onto porous LDPE for 2 mins at 1500 rpm

- let it cure at room temp for 48 hr

- put in vac oven at 80 degrees for 2 hrs to complete crosslinking and evaporate remaining toluene

Any help is appreciated!

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