SOLUTIONS OF EXERCISES IN LECTURE 8
Exercise #1
Polystyrene: M 0 =104 g.mol -1 ;
-1
g.mol 89440 = n M ; PDI = 1.5
860 =
n x and
-1
g.mol 134160 = w M
Exercise #2
Poly(ethylene-stat-vinyl acetate); vinyl acetate: va; ethylene: et
M et =28 g.mol -1 ; M va =86 g.mol -1 ;
-1
g.mol 39870 = n M
Mole fraction of ethylene, n et = [(87.1/100)/28]/((0.871/28)+(0.129/86)) = 0.954
Mole fraction of vinyl acetate, n va = 0.046
1
0
. 67 . 30 28 954
. 0
86 046
. 0
