Preparation of single chain nanoparticles via photoinduced radical coupling process

Dashan I., Balta D. K., Temel B., Temel G.

EUROPEAN POLYMER JOURNAL, vol.113, pp.183-191, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 113
  • Publication Date: 2019
  • Doi Number: 10.1016/j.eurpolymj.2019.01.054
  • Journal Name: EUROPEAN POLYMER JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.183-191
  • Keywords: Polymeric nanoparticles, Single chain folding, Photoinduced ketyl coupling, Controlled radical polymerization, POLYMERIC NANOPARTICLES, PHOTOINITIATOR, COPOLYMERS, ROUTE, LIGHT, BLOCK, ATRP, UV
  • Bezmialem Vakıf University Affiliated: Yes

Abstract

This contribution introduces a straightforward method for preparing well-defined polymeric nanoparticles using radical coupling process of ketyl moieties resulted from triplet excitation of pendant benzophenone groups. In the first step, poly(styrene-co-chloromethylstyrene) is synthesized by thermally initiated controlled radical co-polymerization technique and subsequently, pendant chloride groups undergo post-modification with 4-hydroxybenzophenone. Achieved well-defined side-chain benzophenone containing copolymers generate ketyl radicals in the presence of excess hydrogen donor molecule upon UV-light irradiation and intramolecularly crosslinked nanoparticles are formed by radical coupling process in dilute regime. Resulting single chain nanoparticles and intermediates are characterized by H-1 NMR, gel permeation chromatography, differential scanning calorimetry, UV-Vis spectrometry and electron microscopy techniques.