User:Elizabeth Ghias/Notebook/Experimental Chemistry/2012/09/07

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Objective

To conduct Differential Scanning Calorimetry and to complete the cross-linking reactions conducted last week.


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) 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 were placed into an oven set to 90°C for 90 minutes.


List of Films

  • Film 1 = 0.5110 g PVA (MW = 22,000) in 3 mL H2O, no acid
  • Film 2 =
  • Film 3 =
  • Film 4 =
  • Film 5 =
  • Film 6 =
  • Film 7 =
  • Film 8 =


Data

<Differential Scanning Calorimetry</u>

Trial 1 (Film 1) - mass of pan and lid = 0.05002 g, mass of pan and lid with material = 0.05285 g

Trial 2 (Film 3) - mass of pan and lid = 0.04993 g, mass of pan and lid with material = 0.05317 g

Trial 3 (Film 5) - mass of pan and lid = 0.04880 g, mass of pan and lid with material = 0.05132 g


Notes

This area is for any observations or conclusions that you would like to note.


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