“tree-shaped” copolymers based on poly (ethylene glycol) and atactic or isotactic polylactides: Synthesis and characterization
Abstract
Abstract “Tree‐shaped” copolymers constituted by an m‐PEG trunk and poly(L‐lactide) or poly(D,L‐lactide) branches were obtained. The m‐PEG was functionalized at the terminal chain with two (G1) and four (G2) hydroxyl groups, then reacted with Al(CH3)3 to produce aluminum alkoxide species, active as initiators in the ROP of L‐ or D,L‐lactide. Copolymers were characterized by 1H and 13C NMR, GPC and DSC, and compared with analogous linear copolymers. Characterization of a low‐molecular‐weight G1 copolymer confirmed the architecture. GPC curves showed monomodal and narrow molecular weight distribution for all the samples, while the melting points of the copolymers seemed more correlated to the architecture than to the composition. magnified image
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The final properties of copolymers are dictated not only by composition but also by macromolecular structure details such as molecular weight, dispersity, end-groups, microstructure and architecture.
“The final properties of the copolymers are dictated not only by their composition. Additionally, the details of the macromolecular structure, such as the molecular weight and dispersity, kind of end-groups [22], the polymer microstructure and architecture are important factors [23].”
From Thermo-Rheological and Shape Memory Properties of Block and Random Copolymers of Lactide and ε-Caprolactone (2021) · cites this paper as [23]
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References 50 · Cited by 20
- Authors
- Izzo, L., & Pappalardo, D.
- Affiliations
- University of Salerno (IT)
- Corresponding author
- Izzo, Lorella
- Pappalardo, Daniela
- Venue
- Macromolecular Chemistry and Physics
- Publisher
- Wiley
- Published
- 2010-09-06
- Volume
- 211
- Issue
- 20
- Pages
- 2171-2178
- ISSN
- 1022-1352 (ISSN-L)
- 1521-3935
- OpenAlex
- W2003956827
- Cited by
- 20
- References
- 50
- Citations by year
- 2024: 1 · 2022: 1 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 2 · 2016: 1 · 2015: 1 · 2014: 1 · 2013: 3 · 2012: 4
- FWCI
- 1.19
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecular Chemistry and Physics (publishedVersion)
- IrInSubria (University of Insubria) (submittedVersion)
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Dendrimers and Hyperbranched Polymers
- Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
- Keywords
- poly(L-lactic acid), poly(D,L-lactide), ring-opening polymerization, branched polymers, molecular weight distribution, melting point, polymer architecture
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