Chemical Degradation and Stress Cracking of Polycarbonate in DS2.

Abstract

Polycarbonate (PC) undergoes loss of physical integrity and ultimate dissolution in the decontaminant DS2. In order to gain a better understanding of this process, this study evaluates the effects of each of the three components of DS2 on PC. Weight loss measurements of PC in DETA (70%), MCEL (28%) and MCEL+NaOH (2%) show that DETA is the most aggressive component in DS2. The FTIR spectra of PC/DETA, PC/MCEL, and PC/MCEL+NaOH indicate that the principle degradation mechanism of PC in DS2 is the chain cleavage reaction taking place at the carbonate linkage due to the attack of the amine and the hydroxide. Mass spectroscopy analysis on the dry PC/DS2 residue indicates that numerous low molecular weight products are formed. Results of stress cracking of PC with DS2 and DETA show a considerable breakdown in resistance. The MCEL component is less aggressive than DETA, but still induces significant stress cracking. Keywords: Polycarbonates, Stress cracking, Chemical degradation, Decontaminants, Fourier transform infrared.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA188532

Entities

People

  • Janice J. Vanselow
  • Lidia A. Lee

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Body Weight
  • Chemical Reactions
  • Engineering
  • Information Processing
  • Mass Spectroscopy
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Mechanical Properties
  • Military Research
  • Molecular Weight
  • Resistance
  • Spectra
  • Spectroscopy
  • Stress Cracking

Readers

  • Polymer Science and Engineering.
  • Polymer Science and Technology