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3 . Gives a value of E = 1 6 0 GPa fora fiber of linear polyethylene, in which the polymer chains are aligned with

3 .

Gives a value of E

= 160

GPa fora fiber of linear polyethylene, in which the polymer chains are aligned with

the fiber axis. Why is this value so much higher than the typical E

3

GPamentioned for polymers in fact

almost as high as the value for iron and steel?

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