True or False 1. A polymer with a viscous behavior will not return to its original dimension after the load has been removed. 2. For a totally elastic polymer, there is a delay in the strain response to an applied load. 3. Glass transition can occur in a purely crystalline polymer.
True or False
1. A polymer with a viscous behavior will not return to its original dimension after the load has
been removed.
2. For a totally elastic polymer, there is a delay in the strain response to an applied load.
3. Glass transition can occur in a purely crystalline polymer.
4. The time needed to achieve 50% crystallization of polypropylene decreases with increasing
temperature.
5. Polymerization of polyethylene occurs via addition polymerization.
6. It is possible for condensation polymerization to occur with only one type of monomer.
7. The resolved shear stress is the same for all slip systems of an FCC structure
8. Metals with HCP crystal system tends to be more ductile because they have a smaller number
of slip systems
9. All metals have the same slip system
10. For slip, the crystallographic orientation above and below the twin plane is the same both
before and after the deformation; for twinning, there will be a reorientation across the slip
plane.
11. It is possible for plastic deformation to occur through the movement of screw dislocations
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