Accession Number:

ADA162702

Title:

Synthesis of Hydrophobic, Crosslinkable Resins.

Descriptive Note:

Annual rept. no. 2,

Corporate Author:

KINGSTON POLYTECHNIC KINGSTON UPON THAMES (ENGLAND)

Report Date:

1985-12-01

Pagination or Media Count:

36.0

Abstract:

This is the second annual report of progress in the synthesis of organic, crosslinkable polymers of low water absorption, for use as matrix materials in fiber composites andor as coatings or adhesives. The approach has been to synthesize low molecular weight, chloromethyl terminated polyethers by the reaction of any of a number of bisphenols with the para or meta isomers of dichloroxylene. Various reaction conditions are described, and the polymers thus produced are discussed briefly. The chloromethyl ends have in one case been converted to vinyl groups by the Wittig reaction, and the resultant unsaturated polymer crosslinked by heat alone without peroxide. Some properties of the crosslinked polymer have been briefly explored, and the low equilibrium water uptake of the product confirmed. Further improvements are necessary in the control of molecular weight distribution and crosslink density before attention turns to fabrication and mechanical property determination. Originator supplied keywords include Thermosetting, Moisture, Unsaturation, and Free radical.

Subject Categories:

  • Polymer Chemistry
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE