Cited by 166biodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisAdvanced Polymer Synthesis and Characterization

A Highly Efficient Initiator for the Ring-Opening Polymerization of Lactides and ε-Caprolactone: A Kinetic Study

Chen, Hsuan-Ying, Huang, Bor-Hunn, Lin, Chu-Chieh·2005·Macromolecules

Abstract

A trinuclear zinc alkoxide [{(BDI-OMe)Zn(μ-OBn)} 2 Zn(μ-OBn) 2 ] ( 1 ) and a homoleptic zinc complex [(BDI-OMe) 2 Zn] ( 2 ) have been prepared by the addition of benzyl alcohol to a mixture of BDI-OMe-H with Et 2 Zn. Compound 1 has been employed as an initiator for ring-opening polymerization of lactides and ε-caprolactone. The highly efficient initiator of the zinc complex shown in the polymerization process enabled us to synthesize the PLA at ambient temperature, yielding PLA with well molecular control and narrow molecular weight distribution in a very short period of time. The polymerization kinetics were studied with [LA] 0 /[ 1 ] = 200/1 and [LA] 0 = 0.5 M at 25 °C. Experimental results indicate a second-order dependency on [LA] ( k obs = 0.033 M -1 s -1 ). Moreover, a first-order dependency in [ 1 ] is indicated of k obs vs [Initiator], with a slope equal to the first-order rate constant k = 12.2 M -2 s -1 . Furthermore, the heterotactic PLA with Pr up to 83% can be achieved in a mixed solvent of CH 2 Cl 2 and THF at −35 °C. However, according to polymerization kinetic studies of CL, a first-order dependency on [CL] and [ 1 ] is observed for ROP of ε-caprolactone.

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Crossref · 10.1021/ma050672f

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Authors
Chen, H.-Y., Huang, B.-H., & Lin, C.-C.
Affiliations
National Chung Hsing University (TW)
Venue
Macromolecules
Published
2005-05-28
Volume
38
Issue
13
Pages
5400-5405
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2064824669
Cited by
166
References
52
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 7 · 2021: 9 · 2020: 2 · 2019: 6 · 2018: 3 · 2017: 5 · 2016: 10 · 2015: 10 · 2014: 9 · 2013: 13 · 2012: 13
FWCI
4.43
Type
journal article
Language
en
Open access
closed
Locations
Macromolecules (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
  • Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
Keywords
ring-opening polymerization, lactide, ε-caprolactone, poly(L-lactic acid), trinuclear zinc complex, polymerization kinetics, second-order kinetics, molecular weight distribution, ambient temperature polymerization

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