Effect of Halogen Chain End Fidelity on the Synthesis of Poly(methyl methacrylate-<Emphasis Type="Italic">b</Emphasis>-styrene) by ATRP |
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| Authors: | Guang-Cheng Huang Sheng-Xiang Ji |
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| Institution: | 1.Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,China;2.University of Chinese Academy of Sciences,Beijing,China |
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| Abstract: | 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″-pentamethyldiethylenetriamine (CuBr/PMDETA) catalysts, PMMA-b-PS synthesized using p-toluenesulfonyl chloride/CuCl/bpy (TsCl/CuCl/bpy) and CuCl/PMDETA catalysts has a higher halogen CEF and a better control on molecular weight. |
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