Living anionic polymerization of 4-diphenylphosphino styrene for ABC triblock copolymers

Alison R. Schultz, Mingtao Chen, Gregory B. Fahs, Robert B. Moore, Timothy Edward Long

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Living anionic polymerization of 4-diphenylphosphino styrene (DPPS) achieved unprecedented poly(S-b-I-b-DPPS) ABC triblock copolymers with predictable molecular weights and narrow polydispersities. In situ Fourier transform infrared spectroscopy probed the anionic polymerization, monitoring vinyl disappearance during sequential monomer addition for kinetic analysis. Varying the concentration of reinforcing, polystyrenic external blocks enabled diverse compositions with tunable thermomechanical properties and tailored morphology. Dynamic mechanical analysis confirmed the presence of microphase separation in the triblock copolymers and revealed a broad temperature range (ca 100 oC) for a plateau region and onset of flow temperatures above 100 oC. Small-angle X-ray scattering and atomic force microscopy collectively revealed solid state morphologies of the triblock copolymers and probed phase separation at the nanoscale. Well-defined poly(S-b-I-b-DPPS) ABC triblock copolymers with tunable structure − property relationships now permit phosphorus-containing thermoplastic elastomers for emerging applications.

Original languageEnglish
Pages (from-to)52-58
Number of pages7
JournalPolymer International
Volume66
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • anionic polymerization
  • in situ FTIR spectroscopy
  • morphology
  • phosphonium
  • thermomechanical
  • thermoplastic elastomer

ASJC Scopus subject areas

  • Polymers and Plastics

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