Table 3 Ethylene polymerization and copolymerization studies with titanium catalystsa.

From: A general strategy for heterogenizing olefin polymerization catalysts and the synthesis of polyolefins and composites

Ent

Cat.

Comon.

Yieldb/g

Act.b (106)

Incorp.c mol%

Tmd/oC

Mne(104)

Mw/Mne

1

Ti

–

0.26

6.2

–

136.3

51.3

2.7

2

Ti-ONa

–

0.35

8.4

–

136.1

138.9

2.5

3

Ti-SiO2

–

0.38

9.1

–

136.6

60.8

2.5

4

Ti-ONa-SiO2

–

1.62

38.9

–

137.5

289.7

2.0

5

Ti-ONa-Al2O3

–

1.71

41.0

–

137.7

325.2

1.9

6

Ti-ONa-MgO

–

1.65

39.6

–

137.2

424.2

2.7

7

Ti

1-hex

0.28

1.1

2.6

124.9

4.7

2.4

8

Ti-SiO2

1-hex

0.69

2.8

0.3

132.9

11.8

6.5

9

Ti-ONa

1-hex

0.59

2.4

4.0

121.6

8.4

2.9

10

Ti-ONa-SiO2

1-hex

1.38

5.5

2.5

127.6

56.9

3.2

11

Ti

4MP1

0.12

0.5

2.3

126.8

8.2

2.3

12

Ti- SiO2

4MP1

0.55

2.2

0.4

130.9

7.1

4.6

13

Ti-ONa

4MP1

0.52

2.1

2.8

126.2

11.5

2.1

14

Ti-ONa-SiO2

4MP1

1.87

7.5

1.3

128.2

79.4

3.0

  1. aConditions: The same metal loading (20 µmol/g) was used for all solid supports (10 µmol/g loading for Ti-SiO2); Et2AlCl: 500 eq., 3 mL (comonomer + n-heptane), T = 30 °C, Entry 1–6: Ti quantity = 0.25 µmol, ethylene pressure = 8 atm, time = 10 min; Entry 7–14: Ti quantity = 0.5 µmol, ethylene pressure = 2 atm, time = 30 min, comonomer: 2 mol·L−1.
  2. bPolymer yield and activity values are average of at least two runs. Activity = 106 g mol−1 h−1.
  3. cComonomer incorporation ratio was determined by NMR in C2D2Cl4 at 120 °C.
  4. dMelting temperature determined by DSC.
  5. eMn: 104 g mol−1, Mn and Mw/Mn determined by GPC in trichlorobenzene at 150 °C.
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