a- On the side, the molecular weight data for a material made of polyvinyl fluoride (or polyethylene fluoride) are tabulated.

1. Write the chemical formula for the mer unit of this polymer.

2. Calculate the molecular weight of the mer unit.

3. Calculate the average molecular weight by the weight of the molecules.

4. Calculate your average degree of polymerization by the weight of molecules.

b- The average molecular weight by the number of molecules of a copolymer made of polyethylene tetrachloride (TClPE) and polyethylene (PE) is 750,000 g/mol and an average degree of polymerization by the number of molecules is 12000. Calculate the fraction of each mer unit in this copolymer.

molecular weight range (g/mol) x w 8.000-20.000 20.000-32.000 32.000-44.000 44.000-56.000 56.000-68.000 68.000-80.000 80.000-92.000 0,04 0,10 0,16 0,26 0,23 0,01 0,05 0.12 0,25 0.27 0,21 0,09 0,15 0,06