Consider the following two polymeric systems:
A. Poly(styrene-butadiene) amorphous copo...
Chemistry, 09.04.2020 17:06, chubbyxturtle
Consider the following two polymeric systems:
A. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of 50,000 g/mol, and 8% of the available sites crosslinked.
B. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of 200,000 g/mol, and 20% of the available sites crosslinked. Respond to the following questions and justify your answer.
a. Which polymer will display the highest stiffness? Why?
b. Which polymer will display the highest tensile strength? Why?
c. Consider that polymer A has a value of Tg equal to – 25°C (-13F). Sketch two separate stress-strain profile for the same polymer A tested at -100°C (-148F) and 25°C. What is the difference? Explain and draw the graphs.
Answers: 1
Chemistry, 22.06.2019 09:00, kkmonsterhigh18
The diagram below shows a cell placed in a solution. a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution. only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it. it will expand as water moves into it. it will shrink as water moves into it.
Answers: 2
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