TWO YEAR AGING OF ELASTOMERIC VULCANIZATES IN PANAMA, ALASKA AND ILLINOIS.

Abstract

Vulcanizates prepared from commercially available elastomers, many of which have been introduced since 1955, were exposed outdoors at Ft. Wainwright, Alaska, Rock Island, Illinois and the Panama Canal Zone to compare the effects of arctic, temperate and tropic environments over a ten year period. Unstressed test pads and bent loop oxone specimens were used. Results after two years indicate that aging is generally more severe in Panama than in Alaska or Rock Island, although some vulcanizates have shown excellent aging resistance at all three exposure sites. SE 555U high strength silicone (if unpigmented) suffers a severe loss in tensile strength when aged outdoors. Bent loop specimens of EPM (MD460), Hycar 4021 and Genthane SR, all chemically saturated elastomers, have cracked within two years in Panama (all three types) and Rock Island (EPM and Hycar 4021). (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1965
Accession Number
AD0626697

Entities

People

  • E. W. Bergstrom

Tags

DTIC Thesaurus Topics

  • Canals
  • Continents
  • Elastomers
  • Environment
  • Geographic Regions
  • Illinois
  • North America
  • Panama
  • Panama Canal
  • Resistance
  • Tensile Strength
  • Vulcanizates

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.
  • Urban Planning and Geography.