1.) a.) What is the difference between Trouton viscosity h

Homework 5

Polymer Processing

1.) a.) What is the difference between Trouton viscosity and shear viscosity h?
b.) How do their strain rate dependencies differ in polymer melts?
c.) What does the ratio (/h) correlate with?
d.) Describe three types of simple elongational flow. (Include the values of a1, a2, and a3 in the rate of strain tensor (equation 6.8-4).
e.) In simple elongational flow with a constant strain rate how does the length of the sample change with time? (equation 6.8-13).

2.) Tadmor problem 6.13, pp. 194.

Problem should read "Determine the dimensions as a function of time that have to be ..."

3.) Tadmor problem 6.7, pp. 193. (use pp. 174)

4.) Tadmor problem 7.1, pp. 236.

Homework 5 Answers