Table 4.3 Average molecular parameters of branched PE and PP separated by HT-AF4, calculation performed with data from IR-MALLS (reprinted from
[31] with permission of Wiley-VCH)
Sample
Separation
method
Stabilization
Dissolving time
(h)
M w
(kg/mol)
Degradation
(%)
hR g
2
i z
0.5
(nm)
PDI
CSTR LDPE 2 branched (slope
R g /
M ¼ 0.36)
a
HT-AF4
branched
BHT + Ar
2
7,726
100
116
17.40
4
6,246
81
117
12.78
6
5,110
66
102
14.28
HT-AF4
branched
2
6,605
85
113
9.63
4
6,006
78
109
15.67
6
4,423
57
99
11.36
PE B branched (slope
R g /M
¼ 0.47)
a
HT-AF4
BHT + Ar
2
937
100
70
1.13
4
583
62
59
1.12
6
447
48
49
1.08
HT-AF4
2
784
84
64
1.13
4
543
58
53
1.16
6
450
48
45
1.09
PP 180 long-chain branching (slope
R g /
M ¼ 0.50)
a
HT-AF4
BHT + Ar
2
1,275
100
80
1.62
4
976
77
69
1.67
6
723
57
42
1.31
HT-AF4
2
600
47
58
1.40
4
575
45
52
1.44
6
437
34
49
1.45
PP LCB 1 long-chain branching (slope
R g /
M ¼ 0.42)
a
HT-AF4
BHT + Ar
2
2,759
100
74
1.82
4
1,267
46
50
1.51
(continued)
4.3 Analysis of Polyolefins by Asymmetric Flow FFF
169