Table 1 Ethylene copolymerization with Ni catalystsa

From: A co-anchoring strategy for the synthesis of polar bimodal polyethylene

Ent.

Cat.

Mon./mol/L

Yield/gb

Act.b/105

XMc/%

Tmd/°C

Mwe/104

PDIe

Mw1e/104

PDI1e

Mw2e/104

PDI2e

1

Ni1-MgO

tBA/0.1

0.77

3.1

0.6

128.9

28.2

1.9

    

2

Ni2-MgO

tBA/0.1

1.51

6.0

0.1

131.9

92.4

3.7

    

3

Ni3-MgO

tBA/0.1

0.18

0.7

1.7

119.9

1.5

2.9

    

4

Ni1-MgO

UAE/0.5

0.82

16.4

0.6

131.8

81.8

2.7

    

5

Ni2-MgO

UAE/0.5

1.16

23.2

0.1

134.4

161.5

2.7

    

6

Ni3-MgO

UAE/0.5

0.37

7.4

1.2

124.1

1.7

2.8

    

7f

Ni2-MgO

tBA/0.1

0.61

2.4

0.7

125.7

11.0

2.8

    

8

Ni1/Ni3-MgO (1:1)

tBA/0.1

0.41

1.6

1.1

127.5

23.1

11.5

36.5

1.8

2.4

3.1

9

Ni2/Ni3-MgO (1:1)

tBA/0.1

1.01

4.0

0.7

129.9

54.4

34.4

81.5

3.5

1.6

3.6

10g

Ni1/Ni3-MgO (1:1)

tBA/0.1

0.88

3.5

0.2

132.1

244.8

18.4

484.8

2.3

3.6

2.0

11

Ni1/Ni3-MgO (1:5)

tBA/0.1

0.70

2.8

1.4

125.0

25.1

28.5

30.5

3.4

1.6

3.1

12

Ni2/Ni3-MgO(1:1)

UAE/0.5

0.62

12.4

0.5

132.2

78.9

11.7

143.7

3.1

1.2

2.9

13

Ni2/Ni3-MgO (1:5)

UAE/0.5

0.33

6.6

0.9

129.1

52.6

13.3

106.7

2.6

2.7

1.9

14f

Ni2/Ni3-MgO (1:1)

UAE/0.5

0.58

11.6

1.3

126.4

17.4

3.7

22.6

1.8

1.5

1.3

15h

Ni2/Ni3-MgO (1:1)

UAE/0.5

1.96

39.2

0.6

127.2

117.2

13.3

179.1

1.9

5.4

2.1

16

Ni1/Ni2/Ni3-MgO(1:1:1)

UAE/0.5

0.81

16.2

0.7

130.8

93.4

53.9

–j

–j

–j

- j

17

Ni2/Ni3-TiO2(1:1)

UAE/0.5

0.75

15.0

0.2

131.9

50.8

11.4

71.3

4.0

4.3

2.6

18

Ni2/Ni3-GF (1:1)

UAE/0.5

1.21

24.2

0.2

131.0

92.0

11.8

112.1

4.4

5.6

2.6

19

Ni2/Ni3-APP (1:1)

UAE/0.5

1.30

26.0

1.1

129.8

36.1

9.0

41.4

5.9

1.7

1.5

20

Ni2/Ni3-lignin (1:1)

UAE/0.5

0.83

16.6

0.2

130.2

40.5

10.2

67.2

2.1

4.7

2.6

21i

Ni2-MgO/Ni3-MgO

tBA/0.1

1.01

4.0

0.6

118.7/133.9

56.0

34.2

79.7

4.0

1.3

3.4

22i

Ni2-MgO/Ni3-MgO

UAE/0.5

0.60

12.0

0.5

125.6/131.1

72.7

34.4

115.2

3.3

1.3

3.3

  1. GF glass fiber, APP ammonium polyphosphate.
  2. aConditions: Entries 1–3, 7–11, and 21, cat. 5 µmol (Ni); Entries 4–6, 12–20, 22, cat. 1 µmol (Ni); 5 mL Heptane; t = 30 min; T = 80 °C; 8 atm.
  3. bYields are the average of at least two runs. Activity is in units of 105 g/(mol cat. × h).
  4. cIncorporation ratios of comonomers were determined from 1H NMR spectra.
  5. dDetermined by differential scanning calorimetry (DSC, second heating).
  6. eMw: 104 g mol−1, Mn, Mw, and PDI were determined by gel permeation chromatography in 1,2,4-trichlorobenzene at 160 °C. Mw1, PDI1, Mw2, and PDI2 were calculated by Gauss formula and fitting the copolymers generated by two nickel catalysts respectively. Mn, Mn1, and Mn2 are listed in Supplementary Table 2. The fitting curves are shown in Supplementary Fig. 1.
  7. fT = 120 °C.
  8. gP = 30 atm.
  9. hT = 120 °C, P = 30 atm.
  10. iMolar ratio of heterogeneous catalysts Ni2-MgO and Ni3-MgO was 1:1.
  11. jThe sample was generated by three kinds of nickel catalysts and cannot be accurately sealed and fitted.
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