The Fracture of Thermosetting Resins after Exposure to Water.

Abstract

This report considers the importance of molecular weight and molecular weight distribution in determining (a) the hydrolytic stability and (b) the fracture toughness of thermosetting resins. Experimental work (still incomplete) is described. Several orthophthalic polyester resins have been prepared and characterised, and some of them fractionated by precipitation with solvent: non-solvent mixtures. The fracture parameters, hot water resistance and property retention characteristics of the original resins are being compared with those of the fractions, with a two year period of immersion in distilled water at 50 deg C. Medium and high molecular weight fractions show improved hot water resistance. Molecular weight distributions are being measured by gel permeation chromatography and adjusted by combinations of synthetic, blending and fractionating procedures. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1981
Accession Number
ADA107237

Entities

People

  • David T. Ho
  • Geoffrey Pritchard
  • J. Ghotra
  • R. G. Rose
  • W. E. Douglas

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkanes
  • Anhydrides
  • Epoxy Resins
  • Hot Water
  • Material Degradation Processes
  • Materials Laboratories
  • Materials Processing
  • Mechanical Properties
  • Mechanics
  • Molecular Weight
  • Plastics
  • Polymers
  • Reinforced Plastics
  • Resins
  • Resistance
  • Tensile Strength
  • Thermosetting Plastics

Fields of Study

  • Materials science

Readers

  • Polymer Science and Engineering.