Prior Work
- Preliminary work involved preparation of Polyvinyl alcohol (PVOH) films from aqueous solutions
- General Protocol:
- Place 0.5 g PVOH in 10 mL beaker with small stir bar
- Add 3 mL water
- Heat on hot plate to 70°C - 80°C and stir until dissolved (~20 min)
- Remove stir bar and any partially dissolved gel that forms on surface
- Pour solution into small Teflon evaporating dish
- Allow film to air dry in fume hood overnight
- Tested composites:
- Pure PVOH
- PVOH + HAc catalyst (2 - 3 drops)
- PVOH + succinic acid + HAc catalyst
- PVOH + H2SO4 catalyst (2 drops)
Today's Results
- PVOH + sulfuric acid catalyst heated at 100°C for 2 hrs
- Film stiffened, but turned black
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