Improved Synthesis of Oligomeric Sulfone‐Based Phthalonitriles

Abstract

An improved method has been developed to produce an oligomeric sulfonyl‐containing phthalo­nitrile with better processability. The oligomeric phthalonitrile monomer is prepared from the reaction of an excess amount of bisphenol A with 4‐(chlorophenyl)sulfone in the presence of a mixed base system (NaOH/K2CO3) in a dimethylsulfoxide/toluene solvent mixture, followed by end‐capping with 4‐nitrophthalonitrile in a two‐step, one‐pot reaction. This phthalonitrile resin exhibits lower viscosities than previously reported systems for molding into various shapes. After being thermally cured to yield crosslinked polymers, this sulfonyl‐based polymer demonstrates superb mechanical properties and thermo‐oxidative stability, absorbs less than 1.0 weight percent water, and maintains good dielectric properties. image

Document Details

Document Type
Pub Defense Publication
Publication Date
Jul 27, 2015
Source ID
10.1002/macp.201500198

Entities

People

  • Carl B. Giller
  • Holly L. Ricks‐laskoski
  • Judson Hervey
  • Matthew Laskoski
  • Teddy M. Keller

Organizations

  • Leidos
  • Strategic Environmental Research and Development Program
  • United States Naval Research Laboratory

Tags

Fields of Study

  • Chemistry

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Molecular and Cellular Biochemistry
  • Rocket Propulsion.