Lecture 4

Question 1

in step growth, MW distribution will be

Answer 1

wide

Question 2

in step growth, large polymers will form at ____ stages of polymerization

Answer 2

late

Question 3

DP can also equal

Answer 3

molar concentration of functional groups at time 0 / concentration of functional groups at time t
([Mo]-[M]) /[M]

Question 4

carothers equation

Answer 4

Xn = 1/(1-p)

Question 5

we can use slight mismatch in _________ to control MW

Answer 5

concentrations

Question 6

stoichiometric imbalance r is case of A-A with B-B in excess

Answer 6

r = Na/Nb, r<1
Xn = (1+r)/(1+r-2rp)