Non-Destructive Evaluation of the Degradation of Nylon 6,6 Parachute Materials

Abstract

The changes in mechanical, physical and chemical properties of nylon 6,6 parachute canopy fabric on long term ageing at 80 C are reported. The relationship between strength losses on ageing, fibre morphology, molecular weight and state of oxidation determined by chemical and spectroscopic methods, is explored. The technique of phosphorescence spectroscopy shows the greatest potential for non-destructively determining the strength losses of nylon 6,6 canopy material. A study of canopy material from PX-1 and PB-1 parachutes by this technique indicates that valid conclusions concerning strength losses on storage and use can be drawn from accelerated thermal ageing. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1977
Accession Number
ADA048030

Entities

People

  • G. A. George
  • N. M. Browne

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption Spectra
  • Alcohols
  • Chemical Properties
  • Chemical Reactions
  • Chemistry
  • Emission Spectra
  • Engineering
  • Failure Mode And Effect Analysis
  • Materials
  • Mechanical Properties
  • Molecular Weight
  • Organic Chemistry
  • Oxidation
  • Parachute Canopies
  • Parachutes
  • Physical Properties
  • Spectroscopy

Readers

  • Mathematics or Statistics
  • Molecular Photonics/Laser Physics
  • Reinforced Composite Materials