The density and associated percent crystallinity for two polypropylene materials are as follows: (g/cm3) ..................... crystallinity (%) 0.904 ....................................... 62.8 0.895 ....................................... 54.4 (a) Compute

The density and associated percent crystallinity for two polypropylene materials are as follows:

ρ(g/cm3) ..................... crystallinity (%)

0.904 ....................................... 62.8

0.895 ....................................... 54.4

(a) Compute the densities of totally crystalline and totally amorphous polypropylene.

(b) Determine the density of a specimen having 74.6% crystallinity?