DUE:  Week 7, Friday, 5pm to me or in my mailbox in 203 Chem Sci (paper) or midnight by email (PDF).

REPORT OBJECTIVE

Using the Cogswell and Binding approaches, please estimate the elongational viscosity of your polymer from entrance-flow pressure drop as a function of temperature.  Compare your estimate with Trouton's rule (elongational viscosity equals three times shear viscosity).

EXPERIMENTAL NOTES

1. Use the data from Assignment 1.

REPORT NOTES

1. Your report may be as short as you can make, it providing you meet the objective you were given.
2. Please include a title, your name, an executive summary, an introduction, an experimental section (where you describe the instruments you used and how you handled your materials in the laboratory), a results and discussion section (where you describe what experiments were carried out and how they turned out), a summary, and a reference list.  You may look at articles in the journal Macromolecules for guidance on how these sections are typically structured.
3. For the most part, there is no need to repeat things from Report 1; just reference it.  You do need to repeat the experimental apparatus description, but this may be copied verbatim from your previous report.
   
4. You may submit your report as a printout delivered to me or to my CM department mailbox in room 203 Chem Sci or as a PDF file emailed to me as late as midnight on the due date.