화학공학소재연구정보센터
Macromolecular Research, Vol.15, No.6, 541-546, October, 2007
Synthesis and Characterization of Low Molecular Weight Poly(methyl acrylate)-b-Polystyrene by a Combination of ATRP and Click Coupling Method
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The combination of atom transfer radical polymerization (ATRP) and click chemistry was employed for the efficient preparation of well-defined block copolymers. Bromo terminated poly(methyl acrylate) (pMA-Br) was prepared by an ATRP initiator, ethyl-2-bromoisobutyrate (EBiB). Subsequently, the bromine chain end of pMA-Br was converted to an azide group by simple nucleophilic substitution reaction. -Alkyn- -bromo-functionalized polystyrene was also synthesized by ATRP using the alkyn-functionalized initiator, propargyl-2-bromoisobutyrate (PgBiB). In both cases, the conversion was limited to a low level to ensure a high degree of chain end functionality. Then the coupling reaction between the azide end group in pMA-N3 and alkyn-functionalized PgBiB-pSt was performed by Cu(I)catalysis. This coupling reaction was monitored by gel permeation chromatography (GPC). The synthesized block copolymer was characterized by FT-IR, 1H-NMR spectroscopy and 1H-1H COSY correlation spectroscopy.
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