Accession Number:

AD0742648

Title:

Spiral and Other Crazing and Cracking in Polymers with Phenylene Groups in the Main Chain,

Descriptive Note:

Corporate Author:

EXPLOSIVES RESEARCH AND DEVELOPMENT ESTABLISHMENT WALTHAM ABBEY (ENGLAND)

Personal Author(s):

Report Date:

1971-04-14

Pagination or Media Count:

9.0

Abstract:

Environmental stress cracking and crazing are amongst the most important causes of failure of plastics and can severely limit their use in engineering projects. The study concerns this problem. Examination of biaxially stressed films of certain polymers prepared on microscope slides showed, in addition to the normal cracking pattern produced on the application of liquids, that spiral cracks are also produced. Both single and multiple spirals occur and follow the logarithmic curve quite accurately. A single simple assumption is shown to account accurately for the phenomena and for the mathematical form of the curve. Author

Subject Categories:

  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE