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International Journal of Biomaterials
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International Journal of Biomaterials
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2012
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Article
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Tab 3
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Research Article
Synthesis of Block Copolymers of Varying Architecture Through Suppression of Transesterification during Coordinated Anionic Ring Opening Polymerization
Table 3
NMR data of the structural analysis of triblock copolymers.
N
Molar ratio
α
-methyl styrene : Sn(Oct)
2
Ratio L-lactide/
ε
-caprolactone (% mol by
1
H NMR)
PCL segment length, monomer units
PLA segment length, monomer units
1
2.5
42.7/57.3
21.3
25.2
2
25
41.8/58.2
26.5
24.2
3
125
42.2/57.8
5.7
12.1
4
250
45.3/54.7
40.2
42.3
5
2500
49.8/50.2
26.6
39.0
6
No protector
41.8/58.2
5.8
7.8