User:Elizabeth Ghias/Notebook/Experimental Chemistry/2012/09/07: Difference between revisions

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# The masses of three DSC pans and lids were measured.   
# The masses of three DSC pans and lids were measured.   
# 3 ± 0.3 mg of film (Films 1, 3, and 5 were used) were added to each pan.
# 3 ± 0.3 mg of film (Films 1, 3, and 5 were used, see below) were added to each pan.
# Each pan and lid were placed into the press.
# Each pan and lid were placed into the press.
# The three samples were placed into the DSC in spaces 6,7, and 8.
# The three samples were placed into the DSC in spaces 6,7, and 8.
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<u>Crosslinking Reactions</u>
<u>Crosslinking Reactions</u>


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




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




Revision as of 13:16, 10 September 2012

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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, 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.


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

<Differential Scanning Calorimetry

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.


Use categories like tags. Change the "Course" category to the one corresponding to your course. The "Miscellaneous" tag can be used for particular experiments, as instructed by your professor. Please be sure to change or delete this tag as required so that the categories remain well organized.



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