User:Samiye Yaman/Notebook/Lab 581/2012/09/05

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Objective

Description

Synthesizing PVOH

 -0.5 g of polvinyl alcohol (MW:22000) was placed in to beaker 1. 3 ml of water was added to the beaker.(Solution 1)
 -1 g of PVOH (MW:22000) was placed in to beaker 2. 6 ml of water was added to the beaker.(Solution 2)
 -0.5 g of PVOH (MW:100000) was placed in to beaker 3. 5 ml of water was added to the beaker.(Solution 3)
 -1g of PVOH (MW:100000) was placed. in to beaker 4. 7 ml of water was added to the beaker.(Solution 4)
 -All four beakers were placed on to the hot plate for 15 minutes until the solutions become clear. 
 Each solution was then poured in to separate teflon plates. Before letting it dry under the hood, acids drops are added to solutions. 
  • 1 drop of phosphoric acid and 1 drop of 10 weight % maleic acid (made from 0.5 g+ 10ml water) were in to Solution 1.
  • 2 drops of phosphoric acid and 2 drop of 10 weight % maleic acid (made from 0.5 g+ 10ml water) in to Solution 2.
  • 1 drop of HCl and 1 drop of 5 weight % succinate acid (made from 0.5 g+ 10ml water) in to Solution 3.
  • 2 drops of HCl and 2 drops of 5 weight % succinate acid (made from 0.5 g+ 10ml water)in to Solution 2.

Note: The PVOH in beaker 2 3 and 4 did not fully dissolved. Some stayed at the bottom of the beaker.

Using DSC to measure the thermal change of specific films

A1- 0.5 g of PVOH (MW:22000)+ 1 drop phosphoric acid (Only 2.57 mg of the film is used)

A2- 0.5 g of PVOH (MW:100000) + 1 drop of HCl (Only 2.8 mg of the film is used)

A3- 0.5 g of PVOH (MW:22000) (Only 3.22 mg of the film is used)

A4- 0.5 g of PVOH (MW:100000) (Only 2.95 mg of the film is used)

Data

DSC DATA

For A1 Media:A122000H3PO4.001.pdf

For A2 Media:A2100000HCl.001.pdf

For A3 Media:A322000.001.pdf

For A4 Media:A4100000.001.pdf

Notes

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


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