Question: please help with b and c! make sure to answer all parts of b. thanks! 3. Poly(methyl acrylate) (PMA) is a rubbery polymer in most

please help with b and c! make sure to answer all parts of b. thanks!

3. Poly(methyl acrylate) (PMA) is a rubbery polymer in most conditions, as its glass transition temperature Tg10C. PMA has a Kuhn length b=15A and a Kuhn molar mass of M0=495g/mol. (a) If the entanglement molecular weight of PMA is Mc11kg/mol, estimate its tube diameter a. (b) PMA has a mass density =1.11g/cm3. Estimate the volume of the Kuhn monomer Eo. How does this compare to the published value of v00.740nm3 ? On the basis of the value Pe=21, estimate the entanglement molecular weight. (c) The length of the confining tube can be expressed as LbN/Ne. Calculate the length of the tube, as well as the reptation time rep, for the polymer chain if it has a monomer friction coefficient c0=31010 g/s and a molecular weight of Mn=45000g/mol

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