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Table 1 Molecular characteristics of the EPT copolymers of different feed ratios

From: Injectable PTHF-based thermogelling polyurethane implants for long-term intraocular application

 

Feed ratio (g)

Composition(wt%)a

Molecular weightb

Sample

PEG

PPG

PTHF

PEG

PPG

PTHF

Mn (kDa)

Mw (kDa)

PDI

EPT3-1 T

7.5

2.5

0.3

75.77

21.31

2.92

40.8

54.8

1.34

EPT3-2 T

7.5

2.5

0.3

76.81

20.25

2.93

43.5

56.7

1.30

EPT5-1 T

7.5

2.5

0.5

73.62

20.71

5.67

46.6

65.8

1.41

EPT5-2 T

7.5

2.5

0.5

75.70

19.96

4.34

47.2

63.6

1.34

EPT7-1 T

7.5

2.5

0.7

74.49

18.33

7.18

46.4

61.9

1.33

  1. a Composition was determined by integration of the 1H NMR spectra for PEG, PPG and PTHF at their characteristic resonance peaks of δ = 3.60, 1.10, and 1.60 respectively
  2. b Molecular weight was determined using gel permeation chromatography with THF as solvent and polystyrene standards
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Biomaterials Research

ISSN: 2055-7124

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