User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/10/17

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Tasks for October 17 To begin synthesis of PVa and 10% wt PVA-Clay films To complete synthesis of films from Oct. 15 To complete synthesis of cation exchange modified clays To determine density of films To complete data analysis New film synthesis 1.0046 g of 22,000 MW PVA and 0.1113 g of NaMT were hydrated with 7 mL of distilled water 1.0082 g of 22,000 MW PVA were hydrated with 7 mL distilled water Heated at approx. 80ºC under gentle stirring until all crystals were dissolved Cooled to room temperature Added 0.5 mL 0.8% wt glutaraldehyde Stirred for 3 min to ensure homogeneity Poured into teflon dish Completion of film synthesis Placed film in sodium sulfate, 1% HCl and sodium bicarbonate. Measuring density of films Cut out 3 pieces each from PVA and PVA-Clay polymer films, allowed to dry and weighed. Measured volume. Density was found to be: Film Initial Mass (g) Dried Mass (g) Displaced volume (mL) Density (g/mL) PVA film 0.0278 0.0102 0.1 0.102 0.0255 0.0129 0.07 0.184 0.0265 0.0089 0.114 0.078 PVA-Clay film 0.0122 0.0067 0.480 0.014 0.0177 0.0102 0.44 0.023 0.0307 0.0145 0.23 0.063 Completion of ionic modified clays Completed synthesis from Oct. 3