Prelab - Polymer cross linking and viscosity

Prelab - Polymer cross linking and viscosity - experimental...

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EXPERIMENT 7 Polymer Cross-Linking and Viscosity Write the answers to these pre-laboratory questions in your lab notebook. Answers to these questions are due at the beginning of your lab section during the week of November 3 rd – 7 th . Pre-laboratory Questions: 1. Write the experiment title and purpose in your lab notebook. 2. Write out the structure for a PVA strand containing a total of six carbon atoms. 3. PVA strands can form hydrogen bonds between different parts of the same strand. Illustrate how this can occur by using a sketch to show the hydrogen bonding. 4. Define viscosity. In what units is viscosity typically reported? Give one example of an
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Unformatted text preview: experimental technique used to measure viscosity. 5. State four places within the procedure where you will make measurements of the viscosity. 6. Calculate the amount of 3.0 M H 2 SO 4 necessary to react with 3 mL of the solution of borate ions created in Part A of the procedure [ 0.4 g of borax (Na 2 B 4 O 7 10H 2 O) in 10 mL of water] . 7. Sketch out a tentative experimental procedure. This procedure need not be overly detailed; a few sentences or an outline/flow-chart should suffice....
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