Hyperbranched Polymers by Visible Light Induced Self-Condensing Vinyl Polymerization and Their Modifications

Bektas S., Çiftçi M., Yagci Y.

MACROMOLECULES, cilt.46, sa.17, ss.6751-6757, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46 Sayı: 17
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1021/ma401534w
  • Dergi Adı: MACROMOLECULES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.6751-6757
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Visible light induced self-condensing vinyl polymerization is explored using 2-bromoethyl methacrylate (2-BEMA) and methyl methacrylate (MMA) as inimer and comonomer, respectively, in the presence of dimanganese decacarbonyl (Mn-2(CO)(10)) for the preparation of hyper-branched polymers. Upon photoexcitation in the visible range, Mn-2(CO)(10) undergoes irreversible decomposition leading to the formation of initiating radicals through bromine abstraction from 2-BEMA. Depending on the concentrations of 2-BEMA and Mn-2(CO)(10) and irradiation time, hyperbranched polymers with different branching density and cross-linked polymers were formed. The resulting polymers possess unreacted bromide groups in the structure which allow postfunctionalization through visible light photopolymerization and Cu(I)-catalyzed click reactions.