User:Samiye Yaman/Notebook/Lab 581/2012/09/07

Experimental Chemistry

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Objective Description Part 1 (Solubility of PVOH) A)0.5 g PVOH MW:22000 + H20 B)0.5 g PVOH MW:22000 + H20 + H2PO4 C)0.5 g PVOH MW:22000 + H2O + H2PO4 + maleic acid Solubility of A, B and C were measured by adding each film into separate beaker. Stir bar was placed in to each beaker with A, B and C. The time required to dissolve each film was recorded. Part 2 (Cross linking of A, B and C and solubility of each film after crosslinking) 0.5 g of A, B and C were placed into 3 separate teflon plate and placed in to 80 degree celcius oven for 90 minutes. The time required for each film to dissolve in water was also recorded. Part 3 (preparing thinner films) *0.1g of PVOH (MW:22000) + 4ml of water *0.1g of PVOH (MW:100000) + 4ml of water Data Without cross-linking, samples were completely soluble in water. After cross-linking, A and B completely dissolved but C did not. 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.