ANIONIC SYNTHESIS AND CHARACTERIZATION OF POLY(4-VINYLPYRIDINE)-POLY(DIMETHYLSILOXANE) BLOCK COPOLYMERS


NUGAY N., KUCUKYAVUZ Z., KUCUKYAVUZ S.

POLYMER INTERNATIONAL, vol.32, no.1, pp.93-96, 1993 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 1
  • Publication Date: 1993
  • Doi Number: 10.1002/pi.4990320115
  • Title of Journal : POLYMER INTERNATIONAL
  • Page Numbers: pp.93-96

Abstract

Poly(4-vinylpyridine)-b-Poly(dimethylsiloxane) (P4VP-b-PDMS) copolymers have been synthesized by sequential anionic polymerization of 4VP and hexamethylcyclotrisiloxane at - 70-degrees-C. The initiator was sodium naphthenate. The solvent used during reactions has a very critical role in an homogeneous polymerization medium. A 1:1 pyridine/THF mixture was found to be the most suitable. The products were characterized by H-1-NMR spectroscopy, transmission electron microscopy (TEM) and differential scanning calorimetry (DSC) techniques. All the results indicated the formation of 4-vinylpyridine-siloxane block copolymers. Also, the P4VP blocks can be completely quaternized with methyl iodide as indicated by H-1-NMR and FTIR spectroscopies.