A crosslinked polybutadiene

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Find shear modulus for polymer at given glass transition temperature and other information as indicated on

A crosslinked polybutadiene (PB) has a glass transition temperature of 173K, and initial number average molecular weight of 40,000 g/mol, a molecular weight between crosslinks of 8000 g/mol, and a density of 1000 kg/m3 . Estimate: a) the shear modulus G at room temperature (300K) b) the ratio of G at 450K to G at 300K. c) the Helmholtz free energy change (J/cm3 ) when the PB is stretched in uniaxial tension to an extension ratio of 2 at 300k

Reference no: EM13887586

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