High-throughput concurrent synthesis of core-crosslinked star -polydimethylsiloxane using an arm-first approach

In this work we use RAFT crosslinking polymerisation coupled with a Chemspeed robotic synthesis platform to optimise conditions to produce PDMS-arm star polymers by an arm-first strategy. The high-throughput polymer product library demonstrated relatively low dispersity ( Đ ≈ 1.5), high monomer conv...

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Bibliographic Details
Published in:Polymer chemistry 2023-09, Vol.14 (37), p.4282-4293
Main Authors: Eyckens, Daniel J., Howard, Shaun, Moad, Graeme, Muir, Benjamin W., Postma, Almar, Simons, Ranya
Format: Article
Language:English
Subjects:
Crosslinking
Ethylene glycol
Glycol dimethacrylates
Polydimethylsiloxane
Polymer chemistry
Polymers
Size exclusion chromatography
Stability analysis
Synthesis
Thermal stability
Thermogravimetric analysis
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Summary:In this work we use RAFT crosslinking polymerisation coupled with a Chemspeed robotic synthesis platform to optimise conditions to produce PDMS-arm star polymers by an arm-first strategy. The high-throughput polymer product library demonstrated relatively low dispersity ( Đ ≈ 1.5), high monomer conversion (>85%) and consistent size (20–40 nm). Varying the crosslinker resulted in differences in polymer product profiles as identified by size exclusion chromatography, with larger linkers between methacrylate handles causing reduced M n and multimodal distribution compared to ethylene glycol dimethacrylate, regardless of starting arm composition or M n . Thermogravimetric analysis revealed greater thermal stability for star polymers with increased PDMS content.
ISSN:1759-9954
1759-9962
DOI:10.1039/D3PY00331K