A sample of cross-linked natural rubber (polyisoprene) is found to have shear modulas G = 217...

A sample of cross-linked natural rubber (polyisoprene) is found to have shear modulas G = 217 kPA at 20 C. Deduce N, the number of sub-chains between crosslinks per m^3 and hence the number average degree of polymerization between crosslinks. The chemical structure of polyisoprene. You may take for relative atomic mass C=12 and H=1, and for the density rho=909 kg/m^3. Assume <r^2>i = <r^2>o.

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Amanda K answered 1 year ago

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