Block‐brush copolymers via ROMP and sequential double click reaction strategy |
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Authors: | Aydan Dag Hatice Sahin Hakan Durmaz Gurkan Hizal Umit Tunca |
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Institution: | Department of Chemistry, Istanbul Technical University, Maslak, Istanbul 34469, Turkey |
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Abstract: | We report an efficient way, sequential double click reactions, for the preparation of brush copolymers with AB block‐brush architectures containing polyoxanorbornene (poly (ONB)) backbone and poly(ε‐caprolactone) (PCL), poly(methyl methacrylate) (PMMA) or poly(tert‐butyl acrylate) (PtBA) side chains: poly(ONB‐g‐PMMA)‐b‐poly(ONB‐g‐PCL) and poly(ONB‐g‐PtBA)‐b‐poly(ONB‐g‐PCL). The living ROMP of ONB affords the synthesis of well‐defined poly(ONB‐anthracene)20‐b‐poly (ONB‐azide)5 block copolymer with anthryl and azide pendant groups. Subsequently, well‐defined linear alkyne end‐functionalized PCL (PCL‐alkyne), maleimide end‐functionalized PMMA (PMMA‐MI) and PtBA‐MI were introduced onto the block copolymer via sequential azide‐alkyne and Diels‐Alder click reactions, thus yielding block‐brush copolymers. The molecular weight of block‐brush copolymers was measured via triple detection GPC (TD‐GPC) introducing the experimentally calculated dn/dc values to the software. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011 |
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Keywords: | azide‐alkyne click reaction block‐brush copolymers brush copolymers Diels‐Alder click reaction graft copolymers Grubbs' catalyst poly(ε ‐caprolactone) poly(methyl methacrylate) polyoxanorbornene poly(tert‐butyl acrylate) ring opening metathesis polymerization (ROMP) triple detection GPC (TD‐GPC) |
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