KINETICS OF C2F4 DISSOCIATION IN NITROGEN SHOCKS

Abstract

A kinetic study of the tetrafluoroethylene difluorocarbene radical reaction was conducted in excess nitrogen behind incident shock waves over the temperature range from 1200 to 1600 K at total gas concentration around 0. 0000125 mole/cc. The rate of formation of CF2 was observed spectrophotometrically. Comparisons between the tetrafluoroethylene difluorocarbene thermal equilibrium constants in N2 and Ar shocks indicate that N2 is vibrationally unrelaxed during chemical relaxation. The temperature determined from the chemical equilibrium constant and the time to reach 0.98 chemical equilibrium after shock compression are used to calculate the N2 relaxation time. The results show that N2 vibrational relaxation in the 1:00 tetrafluoroethylene-nitrogen mixture is about 10 to 50 times faster than in pure nitrogen.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1966
Accession Number
AD0488904

Entities

People

  • A. P. Modica
  • J. E. Lagraff

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Chemical Equilibrium
  • Compression
  • Contractors
  • Contracts
  • Equations
  • Frequency
  • Kinetics
  • Molecules
  • Rate Of Formation
  • Relaxation Time
  • Shock Tubes
  • Shock Waves
  • Space Systems
  • Standards
  • United States
  • Vibrational Relaxation

Readers

  • Molecular Photonics/Laser Physics
  • Organic Chemistry