The Toxicity of Pyrolysis Products from a Chlorotrifluoroethylene - Ethylene Copolymer (Halar Resin)

reportActive / Technical Report | Accession Number: AD0751436 | Open PDF

Abstract:

Thermal decomposition of a one-to-one alternating copolymer of chlorotrifluoroethylene and ethylene poly CTFE-E, produced commercially as Halar, begins at 350 C and is complete at 600 C. The principal gaseous products formed by pyrolysis of poly CTFE-E at 600 C in air are identified as hydrogen fluoride, carbon dioxide, carbon monoxide, hydrogen chloride and formaldehyde. Acute toxic inhalation studies using experimental rats are conducted on the pyrolysis products formed at 550 C in air. A correlation of exposed animal fatalities can be made only with the hydrogen fluoride concentration in the exposure chamber. The LC50 for hydrogen fluoride is determined to be about 42.5 ppm for a single two-hour exposure. The toxic effects on the exposed animals are characterized by primary irritation of the respiratory tract and pulmonary edema and hemorrhage.

Author(s):
Scheel, Lester D. ; Robertson, A. B. ; Kupel, Richard E. ; Richards, Donald E. ; Cooper, Charles V. ; Tolos, William P. ; Vignati, Louis
Author Organization(s):
AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
Supplementary Note:
Presented at the Annual Conference on Environmental Toxicology (2nd), Fairborn, Ohio, 31 Aug, 1-2 Sep 1971, sponsored by the SysteMed Corp., Dayton, OH. See also AD751435 and AD751437.
Pagination:
0027

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AMRL-TR-71-120-PAPER-14
Project Number(s):
AF-6302
Monitor Series:
AMRL
 Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.3.3_Spectrum Management; JCA_6.4.1_Secure Information Exchange; JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.4.1_Force Health Protection; JCA_1.4_Force Support; JCA_6.3_Net Management; JCA_3.2.1_Kinetic Means; JCA_5_Command and Control; JCA_1.2.7_Experimentation; JCA_6.4_Information Assurance; JCA_5.3_Planning; JCA_1_Force Support; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services
Modernization Areas:
Microelectronics
Communities of Interest:
Biomedical
Descriptor(s):
*TOXICITY, *AIRCRAFT FIRES, *CORROSIVE GASES, *COMBUSTION PRODUCTS, *HALOCARBON PLASTICS, OXIDATION, FLUORIDES, PYROLYSIS, ACIDS, CHLORINE COMPOUNDS, HYDROGEN COMPOUNDS, FLUORINE COMPOUNDS, FORMALDEHYDE, LETHAL DOSAGE, CHLORIDES, RESPIRATION
Field(s)/Group(s):
Toxicology, Plastics
Keyword(s):
*FLUORINATED POLYMERS, *HYDROGEN CHLORIDE, *FLUORIDES, *HYDROGEN, CHLORINATED POLYMERS, CTFE(ETHYLENE CHLOROTRIFLUORO), ETHYLENE CHLOROTRIFLUORO, ETHYLENE COPOLYMERS
Report Date:
1971 Dec 01