Copolymerization of L-Lactide and ε-Caprolactone promoted by zinc complexes with phosphorus based ligands
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The zinc complexes 1 and 2 bearing chelating phosphorous based pincer ligands were found to catalyze the ring-opening copolymerization of L-lactide and ε-caprolactone in the melt at 110 °C to obtain a series of random copolymers in which the monomer distributions were coherent with the monomer ratio in the feed. All the obtained copolymers showed high molecular masses with monomodal and moderately narrow distributions. The thermal properties of the achieved copolymers (T g , glass transition temperature, and T m , melting temperature) were strongly dependent on their composition. A linear dependence of T g with molar percentage of lactide in the copolymers was observed over a temperature range from -59 °C (pure polycaprolactone) to 55 °C (pure polylactide).
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It has been reported that reaction rates of monomers can differ in the presence of other comonomers.
“It has been reported that the reaction rates of monomers can differ in the presence of other comonomers.12,13,81”
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- Authors
- D'Auria, I., Lamberti, M., Rescigno, R., Venditto, V., & Mazzeo, M.
- Affiliations
- University of Salerno (IT)
- Corresponding author
- Mazzeo, Mina
- Venue
- Heliyon
- Publisher
- Elsevier BV
- Published
- 2021-07
- Volume
- 7
- Issue
- 7
- Pages
- e07630
- ISSN
- 2405-8440 (ISSN-L)
- PMC
- PMC8339243
- OpenAlex
- W3183818377
- Cited by
- 19
- References
- 62
- Citations by year
- 2026: 6 · 2025: 3 · 2024: 5 · 2023: 2 · 2022: 2 · 2021: 1
- FWCI
- 0.65
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Heliyon (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- 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 › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Keywords
- L-lactide, ε-caprolactone, ring-opening copolymerization, zinc complexes, random copolymers, monomer distribution, glass transition temperature, melting point, polycaprolactone, polylactic acid, melt polymerization
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