Chapter 9

Example 9.4: Calculate X_n for Monomers with the Same End Groups

Initially we have 10 polymer molecules of ARA and 10 polymer molecules of BR¢ B, for a total of 20 structural units (10 R and 10R¢ ), a total of 20 A functional groups and 20 B functional groups. At time t there are seven polymer molecules and the distribution of molecules at time t is shown in the table below. Calculate the fractional conversion of functional groups, p, and the number average chain length .

Go to Solution

Solution

M_A0 = Number of functional groups of A initially = 20

M_A = Number of functional groups of A remaining = 7

N₀ = Number of polymer molecules initially.

N = Number of polymer molecules remaining at time t

or

Back to Chapter 9