Table 2 Ethylene polymerization with intercalation catalyst V-MMT
Run
no.
Initial clay
loading (g)
Polymerization
time (h)
Activity (kg
PE /
mol
V h atm)
Clay mass fraction
(wt%)
Extracted in
decalin (%)
Temperature for 5 wt%
loss
a
(
C)
Temperature for 10 wt%
loss
a
(
C)
1
b
0
2
2.60
0
82.7
367
419
2
0.15
12
50.7
1.61
73.4
388
422
3
0.10
24
28.0
2.43
40.4
403
444
4
0.10
12
36.2
3.76
23.4
426
498
Polymerization conditions: Al(i-Bu)
3 as cocatalyst, [Al]/[V]
¼ 1,000,
n-heptane 100 mL as solvent, room temperature, ethylene 1.2 atm
a
Determined by TGA
b
Homogeneous catalyst VOCl
3 as catalyst, [V]
¼ 1.05 mmol, [Al]/[V]
¼ 15, other conditions are same as for other samples
Polyolefin/Layered Silicate Nanocomposites Prepared by In Situ Polymerization
331