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Table 1 Polymer composition variations based upon the amount of 3 added during synthesis, the ratio of 3 to 4, and the molecular weight based on 1H NMR relative peak integrations

From: Biorenewable triblock copolymers consisting of l-lactide and ε-caprolactone for removing organic pollutants from water: a lifecycle neutral solution

Polymer

Mole ratio 3:4

Average % yielda

Average E factora

Average 1H NMR Mn (Da)a

Standard deviationb

% RSDb

Polydispersity (PDI)

1a

0.056

77

35

1.1 × 104

4.0 × 101

0.40

1.03

1b

0.11

71

36

1.1 × 104

1.5 × 103

14

1.03

1c

0.17

83

28

1.2 × 104

1.1 × 103

9.3

1.04

1d

0.23

76

30

1.2 × 104

4.2 × 102

3.6

1.03

1e

0.28

79

27

1.3 × 104

4.0 × 101

0.30

1.03

1f

0.34

81

25

1.3 × 104

3.7 × 102

2.7

1.04

1g

0.45

77

24

1.8 × 104

1.6 × 103

9.2

1.04

1h

0.56

73

22

1.9 × 104

6.1 × 102

3.3

1.04

1i

0.68

79

20

2.0 × 104

8.5 × 102

4.2

1.05

1j

0.79

77

19

2.3 × 104

1.9 × 103

8.3

1.05

1k

0.90

76

18

2.4 × 104

8.6 × 102

3.6

1.04

1l

0.96

68

22

2.5 × 104

1.6 × 103

6.1

1.05

2

0.00

N.D.

N.D.

9.7 × 103

1.3 × 103

13

1.05

  1. % RSD is the percent relative standard deviation
  2. aAveraged over duplicate or triplicate synthesis trials
  3. bWith respect to average 1H NMR Mn