Synthesis of multiarm star block copolymer based on host-guest inclusion complexation
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Date
2022-01
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Abstract
Supramolecular multiarm star block copolymer ((CD-PEG)p-(Ada-PS)n-polyDVB) was prepared by hostguest interaction of -cyclodextrin ( β-CD) end functionalized polyethylene glycol (β-CD-PEG) and
adamantane peripherally functionalized multiarm star polymer ((Ada-PS)n-polyDVB). The β-CD-PEG was
synthesized by copper-catalyzed azide/alkyne cycloaddition reaction (CuAAC) of alkyne functional PEG
with mono azide functional β-CD (β-CD-N3). Adamantane functional polystyrene (Ada-PS) was prepared by
atom transfer radical polymerization (ATRP) of styrene (St) and was allowed to react with divinyl benzene
(DVB) as a linking agent giving (Ada-PS)n-polyDVB multiarm star polymer. The structures of β-CD-PEG
and (Ada-PS)n-polyDVB multiarm star formation were determined by 1H NMR and GPC. 2D ROESY NMR
and DLS analysis of (CD-PEG)p-(Ada-PS)n-polyDVB were carried out to validate the formation of the
inclusion complex. The evidence of increased molecular weights and size distributions supported the
supramolecular multiarm star block copolymer formation.
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Keywords
Star Polymer, ATRP, CuAAC click, Host-guest interaction