Chemistry Reference
In-Depth Information
Molecular Weight Averages
a
Table 2.2
Number distribution
Weight distribution
Normalized
Not normalized
Normalized
Not normalized
P
x
i
M
i
P
x
i
P
n
i
M
i
P
n
i
P
w
i
P
ðw
i
=M
i
Þ
P
c
i
P
ðc
i
=M
i
Þ
n
U
0
1
n
U
0
0
w
U
0
0
w
U
21
M
n
5
5
5
5
5
5
P
w
i
M
i
P
w
i
P
c
i
M
i
P
c
i
P
x
i
M
i
P
x
i
M
i
P
n
i
M
i
P
n
i
M
i
n
U
0
2
n
U
0
1
w
U
0
1
w
U
0
0
M
w
5
5
5
5
5
5
P
x
i
M
i
P
x
i
M
i
P
n
i
M
i
P
n
i
M
i
P
w
i
M
i
P
c
i
M
i
n
U
0
3
n
U
0
2
w
U
0
2
w
U
0
1
M
z
5
5
P
w
i
M
i
P
c
i
M
i
5
5
5
5
P
w
i
M
i
P
x
i
M
i
P
x
i
M
i
P
n
i
M
i
P
n
i
M
i
P
c
i
M
i
P
c
i
M
i
n
U
0
4
n
U
0
3
w
U
0
3
w
U
0
2
M
z
1
1
5
5
P
w
i
M
i
5
5
5
5
P
c
i
M
i
h
i
1=a
P
x
i
M
a
11
i
P
x
i
M
i
1=a
P
n
i
M
a
11
i
P
n
i
M
i
1=a
1=a
5 ½
w
U
0
a
1=a
w
i
M
i
1=a
M
v
5
5 ½
n
U
0
a11
n
U
0
1
P
c
i
5
5
5
a
See Appendix 2-A for application of these formulas to mixtures of broad distribution polymers.
