see question in photo starting with dynamic Dynamic measurements on a sample of
ID: 799840 • Letter: S
Question
see question in photo starting with dynamic
Dynamic measurements on a sample of poly(ethyl procrastinate) (PEP), give G = 1.0 times 10 7 Pa at Tg + 20 degree C and a frequency of 1 cycle/s. At what frequency would this sample have the same G' al a temperature of Tg + 40 degree C? Crud Chemicals is enviously noticing the market for Tygon flexible tubing. They have developed a linear amorphous polymer with Tg = -10 degree C, which they think may be a good competitor in this market Their polymer has excellent clarity and chemical resistance, but they are not too sure about its mechanical suitability. To check it out mechanically they extrude some tubing and subject it to tests at 20 degree C. These tests consist of taking a fixed length of tubing, pressurising it 50 psi, and determining the average brust time for a large number of samples. The average life of their specimens turns out to be 40h at 20 degree C. To what common laboratory test of viscoelasticity does this test most closed correspond? Estimate the average life of the same tubing in the test at 30 degree C at 37 degree C.Explanation / Answer
help~~~
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.