User:Klare Lazor/Notebook/Chem-496-001/2012/09/07

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Objective

Description

Differential Scanning Calorimetry

  1. The masses of three DSC pans and lids were measured.
  2. 3 ± 0.3 mg of film (Films 1, 3, and 5 were used, see below) were added to each pan.
  3. Each pan and lid were placed into the press.
  4. The three samples were placed into the DSC in spaces 6,7, and 8.
  5. The DSC was run for the each of the three trials with the following program:
    1. Equilibrate (20.00°C)
    2. Ramp (20°C/min to 240°C/min)
    3. Ramp (20°C/min to 20°C/min)
    4. Isothermal (5 minutes)
    5. Repeat steps 2 to 4


Crosslinking Reactions

0.2 g of Films 2,4,5,6, and 7 (See below for list of films) were placed into an oven set to 90°C for 90 minutes.


Evaporation of Films made on 9/5

  • The films made on Wednesday were placed on a hot plate to allow excess water left in the films to evaporate.
    • One film contained 0.5014 g PVA (MW = 22,000) in 5 mL water, with 0.0554 g succinic acid and 3 drops of phosphoric acid
    • The other film consisted of 0.5067 g PVA (MW = 22,000) in 5 mL water, with 0.0562 g maleic acid and 3 drops of phosphoric acid


List of Films

  • Film 1 = 0.5110 g PVA (MW = 22,000) in 3 mL H2O, no acid
  • Film 2 = 1.0084 g PVA (MW = 22,000) in 6 mL H2O, no acid
  • Film 3 = 0.5078 g PVA (MW = 22,000) in 3 mL H2O, with 3 drops of HCl
  • Film 4 = 1.0044 g PVA (MW = 22,000) in 6 mL H2O, with 3 drops of HCl
  • Film 5 = 0.5066 g PVA (MW = 22,000) in 3 mL H2O, with 0.05 g succinic acid and 3 drops of HCl
  • Film 6 = 0.50 g PVA (MW = 22,000) in 3 mL H2O, with 0.05 g Maleic acid and 3 drops of HCl
  • Film 7 = 1.0010 g PVA (MW = 22,000) in 6 mL H2O, with 3 drops of phosphoric acid
  • Film 8 = 0.5053 g PVA (MW = 22,000) in 3 mL H2O, with 3 drops of phosphoric acid

Data

  • Add data and results here...

Notes

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