Effects of Solvents on Craze Initiation and Crack Propagation in Transparent Polymers

Abstract

Transparent polymers being considered for use in Army systems must be evaluated for resistance to crack and craze growth in a chemical environment. Current test for determining craze initiation include environmental stress crazing tests based on ASTM D 790 and ASTM F 484. Results for a series of cast and biaxially stretched poly(methyl methacrylate) (PMMA) materials, as well as several formulations of polycarbonate , show a range of critical strain measurements in crazing solvents. A polyurethane based thermoset material showed superior resistance to crazing in several of these solvents. The effect of solvents on crack propagation in transparent polymers is demonstrated by a Samples of PMMA are tested in o-xylene, and air. Immersion testing is also used for comparison. Polymethyl methacrylates.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1989
Accession Number
ADA208206

Entities

People

  • Alex J. Hsieh
  • Janice J. Vanselow
  • Jennie H. Brown
  • John I. Stevens

Tags

Communities of Interest

  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Alkenes
  • Body Weight
  • Chemical Warfare
  • Chemical Warfare Agents
  • Cracks
  • Engineering
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Measurement
  • Military Research
  • Munitions
  • Plastics
  • Resins
  • Solubility
  • Warfare

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Polymer Science and Technology