X-Ray Investigation of Ballistic Yarns.

Abstract

A series of ballistic polyamide yarns, comprising 12 Kevlar samples and one Nylon 66 sample, were examined by X-ray diffraction. The nine Kevlar 29 and three Kevlar 49 yarns were identified by their lattice parameters as poly(p-phenyleneterephthalamide) rather than poly(p-benzamide). The normalized equatorial scans show a somewhat greater crystallite size or perfection for the Kevlar 49 samples compared to the Kevlar 29 samples. The equatorial scan of the Nylon 66 sample yielded a Crystal Perfection Index of 72 percent. Orientation functions in the range 0.95 to 0.97 were measured for the Kevlar samples, while the corresponding value for the Nylon 66 sample was 0.881. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA082691

Entities

People

  • C. Richard Desper

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Crystal Structure
  • Crystallites
  • Dielectric Polymers
  • Diffraction
  • Information Processing
  • Materials
  • Materials Laboratories
  • Materials Science
  • Military Research
  • New Jersey
  • Orientation (Direction)
  • Physics
  • Plastic Explosives
  • Polymers
  • Radiation
  • X Rays
  • X-Ray Diffraction

Readers

  • Polymer Science and Technology
  • Reinforced Composite Materials
  • Thin Film Deposition Science.