Synthesis of multiarmed poly(3-hexyl thiophene) star polymer with microgel core by GRIM and ATRP methods

Hyun Ji Kim, Yun Jae Lee, Seung Sang Hwang, Dong Hoon Choi, Hoichang Yang, Kyung Youl Baek

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16 Citations (Scopus)

Abstract

Regioregular poly(3-hexyl thiophene) (rr-P3HT)-based star polymers were synthesized by a crosslinking reaction of the linear rr-P3HT macroinitiator and ethylene glycol dimethacrylate (EGDMA) crosslinker through Ru-based atom transfer radical polymerization (ATRP), where the rr-P3HT macroinitiator was prepared by Grignard metathesis method (GRIM) followed by end functionalization of the ATRP initiator with chlorophenylacetate (CPA) to the rr-P3HT. Relatively high molecular weight of the star polymers were obtained (Mp = 8,988,000 g/mol), which consisted of large numbers of the rr-P3HT arm chains radiating from the EGDMA-based microgel core. The yield of the star polymers were strongly affected by the added amount of the EGDMA crosslinker. The crystalline structure of the rr-P3HT by intermolecular π-π stacking interaction gradually decreased as the star polymer formed, which was confirmed by differential scanning calorimeter (DSC), atomic force microscopy (AFM), and electro-optical analyses.

Original languageEnglish
Pages (from-to)4221-4226
Number of pages6
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume49
Issue number19
DOIs
Publication statusPublished - 2011 Oct 1

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Keywords

  • atom transfer radical polymerization (ATRP)
  • conducting polymers
  • crosslinking
  • microgels
  • star polymers

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

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