摘要
Poly（methyl methacrylate-b-styrene） （PMMA-b-PS） block copolymers are synthesized by two consecutive ATRPs and fractionated into four fractions. The halogen chain end fidelity （CEF） in PMMA-b-PS is quantified based on the analysis of each fraction. Compared to ethyl 2-phenyl-2-bromoacetate/CuBr/2,2＇-bipyridine （EPBA/CuBr/bpy） and CuBr/N,N,N＇,N＂,N＂-pentamethyldiethylene- triamine （CuBr/PMDETA） catalysts, PMMA-b-PS synthesized using p-toluenesulfonyl chloride/CuCl/bpy （TsC1/CuC1/bpy） and CuC1/PMDETA catalysts has a higher halogen CEF and a better control on molecular weight.
Poly（methyl methacrylate-b-styrene） （PMMA-b-PS） block copolymers are synthesized by two consecutive ATRPs and fractionated into four fractions. The halogen chain end fidelity （CEF） in PMMA-b-PS is quantified based on the analysis of each fraction. Compared to ethyl 2-phenyl-2-bromoacetate/CuBr/2,2＇-bipyridine （EPBA/CuBr/bpy） and CuBr/N,N,N＇,N＂,N＂-pentamethyldiethylene- triamine （CuBr/PMDETA） catalysts, PMMA-b-PS synthesized using p-toluenesulfonyl chloride/CuCl/bpy （TsC1/CuC1/bpy） and CuC1/PMDETA catalysts has a higher halogen CEF and a better control on molecular weight.
基金
financially supported by the National Natural Science Foundation of China(Nos.51173181 and 51373166)
“The Hundred Talents Program”from the Chinese Academy of Sciences,and Department of Science and Technology of Jilin Province(No.20160414032GH),China
