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Table 3 Solvent free ROP of rac -lactide for Ti(1–6)(O i Pr) 2 at 130°C in a 300:1 [ rac -lactide]:[initiator]

From: Monomeric Ti(IV) homopiperazine complexes and their exploitation for the ring opening polymerisation of rac-lactide

 

Time (hours)

Conv. (%)a

M n b

PDIb

P r c

Ti(1)(OiPr)2

24

54

12050

1.07

0.56

Ti(2)(OiPr)2

24

50

7900

1.19

0.63

Ti(3)(OiPr)2

24

42

7050

1.14

0.53

Ti(4)(OiPr)2

24

41

6750

1.10

0.63

Ti(5)(OiPr)2

24

60

10900

1.14

0.61

Ti(6)(OiPr)2

24

51

6850

1.23

0.55

  1. aConversion ascertained by 1H NMR spectroscopy. bMolecular weight and PDI determined by GPC (THF) using polystyrene standards. cP r as calculated from 1H NMR homonuclear decoupled spectroscopy in CDCl3.
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BMC Chemistry

ISSN: 2661-801X

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