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E5 Polymer Viscosity

E5 Polymer Viscosity - borate ions created in Part A of the...

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EXPERIMENT 5 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 on October 3-5 (for Monday, Tuesday and Wednesday lab sections) or October 13-14 (for Thursday and Friday lab sections). 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. Define viscosity. In what units is viscosity typically reported? Give one example of an experimental technique used to measure viscosity. 4. State four of the six places within the procedure where you will make measurements of the viscosity. 5. Calculate the amount of 3.0 M H 2 SO 4 necessary to react with 3 mL of the solution of
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Unformatted text preview: 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]. 6. One of your tasks in the experiment is to design a procedure for measuring changes in viscosity using equipment available. Briefly describe your tentative procedure for measuring changes in viscosity. A few sentences or a flow chart will be sufficient. ( Note: This is only a brief description of a tentative procedure. You may want to modify your procedure in lab once you start working on the experiment. You will need to describe in more detail in your lab notebook the actual procedure that you use to measure changes in viscosity. This actual procedure should be turned in with your data carbons at the end of lab.)...
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