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 β-pinene 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.
通过对 N-
溴丙基马来
酰亚胺和
β-蒎烯单体进行多步替代 RAFT 聚合,合成了分子结构明确、两端
溴基数量精确的线性聚
苯乙烯(PS)。
溴端基团通过亲核取代转化为
叠氮基团。通过
铜(I)催化的
叠氮-炔环加成反应(Cu
AAC),末端具有指定数量
叠氮基团的线性 PS((N3)x-PS-(N3)x)与单炔基和二炔基封端 P
EG(dA-P
EG)发生反应,形成了定义明确的 PS-P
EG 两性共聚物和聚合物共网络(APCNs)。制备的 APCNs 表现出独特的有序分离的亲
水相和疏
水相,在极性和非极性溶剂中都具有不同的溶胀能力。