The Mechanism of Strength Losses in Nylon 6,6 Parachute Materials after Salt Water Contamination,

Abstract

Tensile strength losses in nylon 6,6 suspension lines contaminated with seawater result from abrasion damage due to salt crystals that penetrate the weave structure and cause shearing of the nylon filaments. This is contrary to a previous mechanism that attributed these losses to the increased local relative humidity and moisture uptake caused by deliquescent salts, in particular magnesium chloride (MgCl2.6H2O), present in seawater. Analysis using the Rheovibron Viscoelastometer has shown that the presence of MgCl2.6H2O on nylon 6,6 material does not increase the local relative humidity but decreases it, leaving the nylon in a drier state. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1980
Accession Number
ADA099297

Entities

People

  • G. T. Egglestone

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • C4I
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abrasion
  • Australia
  • Chemistry
  • Chlorides
  • Electron Microscopy
  • Engineering
  • Failure Mode And Effect Analysis
  • Filaments
  • Humidity
  • Magnesium
  • Magnesium Compounds
  • Materials
  • Mechanical Properties
  • Moisture
  • Moisture Content
  • Scanning Electron Microscopy
  • Tensile Strength

Readers

  • Materials Science
  • Mathematics or Statistics
  • Polymer Science and Engineering.