Predict trends in glass transition and melting temperatures. Why
are these properties considered in the design...
Predict trends in glass transition and melting temperatures. Why
are these properties considered in the design of consumer products
like plastic cups and ice trays?
Explain why the melting and glass transition temperatures of a
polymer depend on its molecular weight. Your answer should include
reference to free volume theory. (12)
Glass Transition Temperature and Molecular
Motion
List the order of the glass transition temperatures for
polyethylene, polypropylene, polyvinyl chloride, and
polystyrene. PE (-80), PP (-20), PVC (85), PS
(100).
Define the glass transition temperature in polymer materials.
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Describe the reason for this vast range of glass temperatures
among these 4 materials.
How material properties, such as glass transition temp,
conductivity, and crystallinity, change with elevating
temperatures! Meanwhile, corrosion is another pressing issue in our
daily life. What are the origin and underlying mechanisms? Why
Metals oxidize so fast!? How do you extrude polymer into thin
fibers for clothes, fences, and fibers? and how do your favorite
sports connect with composite materials?
Why do oils and fats melt over a range of temperatures?
What do the melting temperatures of the fats and oils suggest
about their fatty acid composition?
How could you use this information to make a reduced-fat chicken
stock or beef stock?
Why is it considered risky and unreliable to use the regression
formula to predict the dependent variable outside the range of the
actual values of the independent variable is...
When thinking about retail properties, what design
elements add value to the property, and why? What are particularly
well-designed elements or a particularly poorly designed element
for retail properties?