A well-defined amphiphilic polymer co-network from precise control of the end-functional groups of linear RAFT polymers
writer：Zhou, C.; Qian, S.; Zhang, A.; Xu, L.; Zhu, J.; Cheng, Z.; Kang, E. T.; Yao, F.; Fu, G. D.
keywords：RAFT, Click Chemistry, Hydrogel
source：期刊
specific source：RSC Adv., 2014, 4, 8144–8156
Issue time：2014年
Linear polystyrene (PS) with well-defined molecular structure and accurate numbers of bromo groups on both ends were synthesized via multiple-step alternative RAFT polymerization of N-bromopropyl maleimide and bpinene monomers. The bromo end groups were transformed into the azido moieties via nucleophilic substitution. The reaction of as-synthesized linear PS having a named number of azide groups on ends ((N3)x–PS–(N3)x) with mono- and dialkynyl-terminated PEG (dA-PEG) via copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) leads to the formation of the well-defined PS–PEG amphiphilic copolymers and polymeric co-networks (APCNs). The as-prepared APCNs exhibit unique ordered separated hydrophilic and hydrophobic phases, and a variable swelling capacity both in polar and non-polar solvents.