Question

10. (25 points) Polymers (a) (10 points) Qualitatively sketch the traditional stress strain diagram for plastics featuring brittle, plastic, and elastomer behavior. Label the plot accordingly. (b) (10 points) Qualitatively sketch the relationship between relaxation modulus and temperature, including labeling the glass and viscous transitions. (c) (5 points) The number-average molecular weight of a polypropylene is 1300000 g/mol. Compute the degree of polymerization? The molecule will be drawn on the board.

          10. (25 points) Polymers
(a) (10 points) Qualitatively sketch the traditional stress strain diagram for plastics
featuring brittle, plastic, and elastomer behavior. Label the plot accordingly.
(b) (10 points) Qualitatively sketch the relationship between relaxation modulus and
temperature, including labeling the glass and viscous transitions.
(c) (5 points) The number-average molecular weight of a polypropylene is 1300000
g/mol. Compute the degree of polymerization? The molecule will be drawn on
the board.

10. (25 points) Polymers
(a) (10 points) Qualitatively sketch the traditional stress strain diagram for plastics
featuring brittle, plastic, and elastomer behavior. Label the plot accordingly.
(b) (10 points) Qualitatively sketch the relationship between relaxation modulus and
temperature, including labeling the glass and viscous transitions.
(c) (5 points) The number-average molecular weight of a polypropylene is 1300000
g/mol. Compute the degree of polymerization? The molecule will be drawn on
the board.

Added by Miguel B.

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