Regular comb polystyrenes and graft polyisoprene/polystyrene copolymers with double branches ("Centipedes"). Quality of (1,3-phenylene)bis(3-methyl-1-phenylpentylidene)dilithium initiator in the presence of polar additives

Hermis Iatrou, Jimmy W. Mays*, Nikolaos Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

The synthesis of regularly spaced comb polystyrenes and graft polyisoprene/polystyrene copolymers with two branches at each junction point (centipedes) is presented. The synthetic approach involves the selective replacement of two chlorines of SiCl4 by polystyrene (PS) followed by step-growth polymerization of the produced (PS)2SiCl2 with α,ω-dilithium PS or 1,4 polyisoprene (PI). The polydispersity indices of the reaction products, PS-g-PS2 (homocentipedes) and PI-g-PS2 (cocentipedes), varied between 2.0 and 3.0 but was reduced to 1.2-1.3 by fractionation. The quality of (1,3-phenylene)-bis(3-methyl-1-phenylpentylidene)dilithium initiator (DLI), used for the synthesis of the dianion, in the presence of polar additives (THF, Et3N, and s-BuOLi), was evaluated.

Original languageEnglish (US)
Pages (from-to)6697-6701
Number of pages5
JournalMacromolecules
Volume31
Issue number19
DOIs
StatePublished - Sep 22 1998

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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