Preparation of Well Defined Polystyrene-Block-Poly (Methylphenylsilylene) Copolymers

Abstract

Combination of the living anionic polymerization of styrene with the ring opening polymerization of cyclotetrasilanes affords the preparation of well-defined polystyrene-block-poly(methylphenylsilylene). Block copolymers with ratios of polystyrene to polysilylene, PS:PMPS ranging from 1:4 to 2:1 have been prepared. The molecular weight distributions are narrow, M(w)/M(n)= 1.3. Removal of any homo polystyrene can be accomplished by precipitation into acetone yielding pure block copolymers with known compositions. The materials have been characterized by 1H and 29Si NMR spectroscopy, Gel Permeation Chromatography, and Differential Scanning Calorimetry.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1994
Accession Number
ADA280799

Entities

People

  • Eric Fossum
  • Krzysztof Matyjaszewski

Organizations

  • Carnegie Mellon University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Block Copolymers
  • Chemical Compounds
  • Chemical Reactions
  • Chemistry
  • Chromatography
  • Copolymers
  • Dielectric Polymers
  • Gel Permeation Chromatography
  • Materials
  • Military Research
  • Molecular Weight
  • Polymerization
  • Polymers
  • Polystyrenes
  • Precipitation
  • Styrenes

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Polymer Science and Technology

Technology Areas

  • Microelectronics