Outdoor Performance of Plastics. 2. Tensile and Flexural Properties.

Abstract

This is the second in a series of reports on outdoor performance of 20 plastics. Computer-aided analysis of tensile and flexural strength data is presented for 24-months exposure in Arizona, Florida and Washington, D. C. Ultimate elongation (tensile) and 5% stress (flexural) showed the greatest change of 11 parameters investigated. These changes characterized loss of elasticity and flexibility. Because of the exponential nature of the deterioration, an objective critical failure-point was defined, by which most of the change had occurred. This is reached at 36.8% retention of initial property-value. Classification systems were useful for quantitatively distinguishing physical performance. Generally, samples performed worst in Arizona and best in Washington, D. C. Actinic radiation and heat thus appear to be primary agents causing physical degradation. jg

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Document Details

Document Type
Technical Report
Publication Date
Mar 18, 1969
Accession Number
ADA303330

Entities

People

  • Glenn E. Fulmer
  • James A. Slater
  • Joseph E. Clark
  • Richard C. Neuman

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Autonomy

DTIC Thesaurus Topics

  • Air Pollution
  • Chemical Reactions
  • Classification
  • Computers
  • Dacron
  • Degradation
  • Elastic Properties
  • Elongation
  • Flexural Properties
  • Flexural Strength
  • Materials
  • Physical Properties
  • Plastics
  • Resilience
  • Stress Strain Relations
  • Tensile Modulus
  • Tensile Properties

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Engineering.
  • Systems Analysis and Design