Microphase separation in normal and inverse tapered block copolymers of polystyrene and polyisoprene. 1. Phase state

P. Hodrokoukes*, G. Floudas, S. Pispas, Nikolaos Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

We have investigated the influence of composition gradients on the microdomain structure and viscoelastic properties of tapered block copolymers by (i) varying the amount of interfacial material and (ii) the block sequence. Normal tapered and inverse tapered triblock copolymers of polystyrene and polyisoperne with a tapered midblock have been synthesized via anionic polymerization with a nearly symmetric composition and compared with the corresponding diblock copolymers. We found that increasing the amount of tapered material within the interface systematically increases the compatibility. Block sequencing is found to be an important factor controlling compatibility. Inverse tapered block copolymers are much more compatible than the corresponding normal tapered block copolymers. Results presented here could be used as a guideline for preparing copolymers with controlled compatibility at the synthesis level.

Original languageEnglish (US)
Pages (from-to)650-657
Number of pages8
JournalMacromolecules
Volume34
Issue number3
DOIs
StatePublished - Jan 30 2001

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Microphase separation in normal and inverse tapered block copolymers of polystyrene and polyisoprene. 1. Phase state'. Together they form a unique fingerprint.

Cite this