Premium
Synthesis and Self‐Assembly of Thermoresponsive Amphiphilic Biodegradable Polypeptide/Poly(ethyl ethylene phosphate) Block Copolymers
Author(s) -
Wu Qiuhua,
Zhou Dan,
Kang Renyu,
Tang Xiuping,
Yang Qi,
Song Ximing,
Zhang Guolin
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402524
Subject(s) - copolymer , micelle , lower critical solution temperature , amphiphile , polymer chemistry , polymerization , critical micelle concentration , materials science , aqueous solution , caprolactone , ring opening polymerization , chemistry , chemical engineering , polymer , organic chemistry , engineering
We report the design and synthesis of new fully biodegradable thermoresponsive amphiphilic poly(γ‐benzyl L ‐glutamate)/poly(ethyl ethylene phosphate) (PBLG‐ b ‐PEEP) block copolymers by ring‐opening polymerization of N ‐carboxy‐γ‐benzyl L ‐glutamate anhydride (BLGNCA) with amine‐terminated poly(ethyl ethylene phosphate) (H 2 NPEEP) as a macroinitiator. The fluorescence technique demonstrated that the block copolymers could form micelles composed of a hydrophobic core and a hydrophilic shell in aqueous solution. The morphology of the micelles as determined by transmission electron microscopy (TEM) was spherical. The size and critical micelle concentration (CMC) values of the micelles showed a decreasing trend as the PBLG segment increased. However, UV/Vis measurements showed that these block copolymers exhibited a reproducible temperature‐responsive behavior with a lower critical solution temperature (LCST) that could be tuned by the block composition and the concentration.