Table 1 Characteristics for linear and cyclic polymers

From: Blocking-cyclization technique for precise synthesis of cyclic polymers with regulated topology

Entry

Polymer

[BNP]:[TNP]:[BNP]:[TNP]: [BNP]:[TNP]:[BNP]:[Cat]a

[PBNP]:[PTNP]b

Mnc (kg mol−1)

PDIc

Yield (%)

1d

l-PBNP40-(b-PTNP20)2

20:20:0:0:0:0:0:1

40:41.3

32.0

1.35

95

2e

c-[PBNP20-(b-PTNP20)2-b-PBNP20]

10:20:10:0:0:0:0:1

40:44.8

25.6

1.31

93

3f

c-[PBNP20-(b-PTNP20)2-b-PBNP20]

10:20:10:0:0:0:0:1

40:48.9

22.9

1.36

88

4d

l-PBNP20-(b-PTNP20)2

10:20:0:0:0:0:0:1

20:39.2

22.1

1.32

93

5f

c-[PBNP10-(b-PTNP20)2-b-PBNP10]

5:20:5:0:0:0:0:1

20:37.2

15.0

1.28

91

6d

l-PBNP20-(b-PTNP40)2

10:40:0:0:0:0:0:1

–

48.6

1.25

93

7f

c-[PBNP10-(b-PTNP40)2-b-PBNP10]

5:40:5:0:0:0:0:1

20:68.2

43.7

1.31

92

8d

l-PBNP20-(b-PTNP80)2

10:80:0:0:0:0:0:1

–

81.8

1.45

92

9f

c-[PBNP10-(b-PTNP80)2-b-PBNP10]

5:80:5:0:0:0:0:1

20:148.0

67.2

1.43

95

10d

l-PBNP20-(b-PTNP120)2

10:120:0:0:0:0:0:1

–

99.2

1.39

91

11f

c-[PBNP10-(b-PTNP120)2-b-PBNP10]

5:120:5:0:0:0:0:1

20:234.4

84.5

1.41

91

12d

l-PBNP20-(b-PTNP160)2

10:160:0:0:0:0:0:1

–

115.2

1.43

95

13f

c-[PBNP10-(b-PTNP160)2-b-PBNP10]

5:160:5:0:0:0:0:1

20:328.6

96.8

1.38

94

14d

l-PBNP20-(b-PTNP200)2

10:200:0:0:0:0:0:1

–

122.3

1.45

83

15f

c-[PBNP10-(b-PTNP200)2-b-PBNP10]

5:200:5:0:0:0:0:1

20:374.7

110.5

1.36

85

16d

l-PBNP20-(b-PTNP160)2

10:160:0:0:0:0:0:1

–

110.2

1.38

91

17f

c-[PBNP10-(b-PTNP160)2-b-PBNP10]

5:160:5:0:0:0:0:1

–

93.1

1.31

89

18d

l-PBNP30-(b-PTNP40)2

15:40:0:0:0:0:0:1

30:81.7

58.9

1.39

94

19f

c-[PBNP10-((b-PTNP20)2-b-PBNP10)2]

5:20:5:20:5:0:0:1

30:81.1

38.2

1.35

94

20d

l-PBNP40-(b-PTNP60)2

20:60:0:0:0:0:0:1

40:89.5

87.4

1.48

83

21f

c-[PBNP10-((b-PTNP20)2-b-PBNP10)3]

5:20:5:20:5:20:5:1

40:86.8

44.0

1.36

85

  1. Polymerization conditions: using Ru-III as catalyst, CH2Cl2 as solvent, temperature = 30 °C (or −20 °C for entries 16 and 17). Polymerization time: (30 + 30 min) for l-PBNP-(b-PTNP)2, (30 + 30 + 30 min) for c-[PBNP-(b-PTNP)2-b-PBNP], (10 + 20 + 10 + 20 + 30 min) for c-[PBNP10-((b-PTNP20)2-b-PBNP10)2], and (10 + 20 + 10 + 20 + 10 + 20 + 30 min) for c-[PBNP10-((b-PTNP20)2-b-PBNP10)3]
  2. aThe feeding ratios of monomers to catalyst for polymerization of di- and monofunctional monomers in sequential addition manner
  3. bThe block ratio of PBNP to PTNP by 1H NMR spectroscopy analysis
  4. cDetermined by GPC in THF relative to monodispersed polystyrene standards
  5. d[BNP]0 = 2 × 10−3 mol L−1 refers to the initial monomer concentration of BNP
  6. e[BNP]0 = 1 × 10−3 mol L−1 refers to the initial monomer concentration of BNP
  7. f[BNP]0 = 5 × 10−4 mol L−1 refers to the initial monomer concentration of BNP
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