1. The three polymers below are to be examined for use as the primary material in a new vascular graft.
(a) Poly(styrene)
(b) Poly(acrylonitrile)
(c) Poly(tetrafluoroethylene)
a. Identify (box/circle) the repeat unit in each polymer.
b. Which polymer would exhibit the highest crystallinity? The lowest? Why?
c. Find the molecular weight of each polymer if each has exactly ten (10) repeat units.
d. Assume the table below presents the Tm and Tg for the three polymers. Based on this information alone, which polymer would you select for fabricating a vascular graft?
Material (a) (b) (c)
Tm (°C) 38 52 102
Tg (°C) 30 28 45