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Role of Self‐Assembly Conditions and Amphiphilic Balance on Nanoparticle Formation of PEG‐PDLLA Copolymers in Aqueous Environments

Phan, Hien; Minut, Robert I.; McCrorie, Phoebe; Vasey, Catherine; Larder, Ryan R.; Krumins, Eduards; Marlow, Maria; Rahman, Ruman; Alexander, Cameron; Taresco, Vincenzo; Pearce, Amanda K.


Hien Phan

Robert I. Minut

Phoebe McCrorie

Catherine Vasey

Ryan R. Larder

Eduards Krumins

Maria Marlow

Ruman Rahman

Cameron Alexander

Vincenzo Taresco

Amanda K. Pearce


The production of well-defined and reproducible poly-meric nanoparticles (NPs), in terms of size and stability in biological environments, is undoubtedly a fundamental challenge in the formulation of novel and more effective nanomedicines. The adoption of PEGylated lactide (LA) block copolymers as biodegradable and biocompatible nanocarriers at different clinical stages has rendered these materials an attractive polymeric platform to be exploited and their formulation is further understood. In the present work, we synthesized a library of linear polyethyl-ene glycol-poly(D,L-lactide) block copolymers with different lengths of LA (15, 25, 50, and 100 LA units) via simple and metal-free ring-opening polymerization, in order to alter the amphi-philic balance of the different macromolecules. The produced polymers were formulated into NPs while varying a series of key parameters in the solvent displacement process, including solvent:nonsolvent ratios and the nature of the two media, and the effect on size and stability was assessed. In addition, stability to protein-NPs interaction and aggregation was studied, highlighting the different NP final properties according to the nature of the amphiphilic balance and nanoformulation conditions. Therefore, we have illustrated a systematic and methodo-logical process to optimize a series of NPs parameters balancing particle size, size distribution, surface charge, and stability to guide future works in the nanoformulation field.

Journal Article Type Article
Publication Date Sep 1, 2019
Journal Journal of Polymer Science Part A: Polymer Chemistry
Print ISSN 0887-624X
Electronic ISSN 1099-0518
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 57
Issue 17
Pages 1801-1810
APA6 Citation Phan, H., Minut, R. I., McCrorie, P., Vasey, C., Larder, R. R., Krumins, E., …Pearce, A. K. (2019). Role of Self‐Assembly Conditions and Amphiphilic Balance on Nanoparticle Formation of PEG‐PDLLA Copolymers in Aqueous Environments. Journal of Polymer Science Part A: Polymer Chemistry, 57(17), 1801-1810.
Keywords Organic chemistry; Materials chemistry; Polymers and plastics
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