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

Experimental Chemistry

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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. 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.