The density and associated percent crystallinity for two polytetrafluoroethylene materials are as follows: col1 rho (g/cm3) 2.144 2.215col2 crystallinity (%) 51.3 74.2 (a) compute the densities of totally crystalline and totally amorphous polytetrafluoroethylene. (b) determine the percent crystallinity of a specimen having a density of 2.26 g/cm3.

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