Synthesis and characterization of poly(ε-caprolactone)-b-polystyrene macromonomer by combined ring-opening and atom transfer radical polymerizations and its use for the preparation of grafted polyphenylenes by Suzuki polycondensation
| Autor: | Ioan Cianga, Seda Yurteri, Yusuf Yagci |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Telechelic polymer
Materials science Polymers and Plastics Atom-transfer radical-polymerization General Chemical Engineering General Chemistry Macromonomer Ring-opening polymerization chemistry.chemical_compound Polymerization chemistry Poly(p-phenylene) Polymer chemistry Materials Chemistry Copolymer Caprolactone |
| Zdroj: | Designed Monomers and Polymers. 8:61-74 |
| ISSN: | 1568-5551 |
| DOI: | 10.1163/1568555053084258 |
| Popis: | A poly(e-caprolactone) (PCL) hydroxy telechelic having a central 2,5-dibromo-1,4-phenylene moiety was reacted with 4-bromomethyl benzoyl chloride to give a bifunctional macroinitiator for ATRP. The polymerization of styrene (St) in the presence of benzyl bromide functionalized PCL afforded a well-defined block-co-polymer having 25 repeating units of e-caprolactone and 19 of styrene and low polydispersity. The resulting polymer, still preserving the central aromatic di-bromo groups, can be used in Suzuki or Yamamoto polycondensations for the synthesis of poly(p-phenylenes) (PPPs) bearing block-co-polymers as side chains. The bromo-functional macromonomer was tested in a Suzuki-type cross-coupling reaction in combination with 2,5-dihexylbenzene-1,4-diboronic acid. This way a polymer with alternating hexyl and PCL-b-PSt side chains was obtained. The intermediate polymers and final PPPs were analyzed by spectral, GPC and DSC measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|