Preparation And Properties Of Block Copolymer Materials Based On Metal Ligands

In this paper,a series block copolymers were analysized by the method of reversible addition fragmentation chain transfer(RAFT)radical polymerization.The properties of the polymer material were discussed by changing the structure and chain length of the polymer.The properties and microphase structure of metal-ligand polymer were studied by adding silver salt.Details are as follows:Thioether monomer,2-(methylthio)ethyl acrylate,was designed and synthesized with the reactant of 2-(methylthio)ethanol and acrylic acid under the esterification catalysis system of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride(EDC-HCl)and 4-dimethyl-aminopyridine(DMAP).Triblock copolymer,diblock copolymer and copolymer were designed and synthesized.Triblock copolymer has two categories.One is Polybutylacrylate-co-2-(methylthio)ethyl acrylate-b-Polystyrene-b-Polybutylacrylate-co-2-(methylthio)ethyl acrylate(PBM-b-PS-b-PBM)in which there are three kinds of length of PS block.First of all,PBM was synthesized,then PBM-b-PS-b-PBM was prepared.The other is Polystyrene-b-Polybutylacrylate-co-2-(methylthio)ethyl acrylate-b-Polystyrene(PS-b-PBM-b-PS).It was prepared on the basis of PS.The diblock copolymer is Polystyrene-b-Polybutylacrylate-co-2-(methylthio)ethyl acrylate(PS-b-PBM).The PBM was synthesized firstly which play the role of chain transfer agent in preparation of PS-b-PBM.The copolymer is Polybutylacrylate-co-2-(methylthio)ethyl acrylate-co-polystyrene(PBMS).The polymer material in coordination with silver salt was designed and synthesized.The mechanics properties and micro structure were discussed based on polymer structure,chain length and other factors.The metal-ligand interaction between polymer and sliver salt was investigated as well.