Question

Calculate and plot the number and weight distributions of x-mers found in a step-growth polymerization for conversions, p, of 0.90, 0.95, and 0.99 for x = 1 to 300. Comment on what species predominate by weight and by number. (Hint: You may want to use excel, Mathematica, or Matlab.)

Answer 1

The formula for weight fraction:

putting this formula in excel we can get the value of w_x for x = 1 t0 300 for different value of p.

Plot:

we see that as p increases, the maximum value shifter towards the higher value of x.

and also for the higher value of p, distribution is more broaden.

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