Journal
POLYMER CHEMISTRY
Volume 8, Issue 5, Pages 936-945Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6py02076c
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- Thuringian Ministry of Science, Education, and Culture (TMBWK) [B515-10065, B514-09051]
- FriedrichSchiller- University Jena
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We present the synthesis and characterization of amphiphilic and double hydrophilic block copolymers containing a polydehydroalanine (PDha) block. First, polystyrene-block-poly(tert-butoxycarbonylaminomethyl acrylate) (PS-b-PtBAMA) and poly(n-butylacrylate)-block-poly(tert-butoxycarbonylaminomethyl acrylate) (PnBA-b-PtBAMA) were prepared by atom transfer radical polymerization (ATRP). Subsequent deprotection led to the corresponding PS-b-PDha and PnBA-b-PDha block copolymers. All intermediate stages were characterized by H-1-, C-13-or solid state MAS C-13-NMR. Afterwards, the solution behavior of PAA-b-PDha was investigated by a combination of dynamic light scattering, zeta potential measurements, and potentiometric titration - revealing that aggregation occurs upon reaching pH values of 3 or lower. In case of PS-b-PDha, core-corona micelles are formed in aqueous solution, as revealed by a combination of DLS and cryogenic transmission electron microscopy.
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