Aging with respect to flammability and other properties in fire-retarded ethylene propylene rubber and chlorosulfonated polyethylene
The flammability characteristics of ethylene propylene and chlorosulfonated polyethylene rubbers containing fire-retardant additives, aged in different thermal and radiation environments have been studied. Flammability parameters for these materials (time to ignition, mass pyrolysis, buring rate and fuel consumption) when exposed to, and aged in thermal, radiation, and thermal/radiation environments are discussed. Two formulations of each type of rubber are compared. The results are a direct contradiction to expected results based on small-scale flammability tests. They show that the fire-retarding agents used in this investigation do not reduce, and in some cases, contribute to, rubber flammability when exposred to a full-scale fire environment. In addition, the results show that for full-scale fire conditions, the energy required for ignition of chlorosulfonated polyethylene is lower than that required for ethylene propylene rubber; a complete reversal of expected results. The effects of aging on the tensile-elongation properties have been determined. Radiation dose-rate effects are also discussed. Results show that the fire-retardant additives have a negligible influence on the tested materials' tensile-elongation properties and on material aging, regardless of the aging environment. The data obtained, however, may be too limited to show significant dose-rate effects. 15 figures, 9 tables.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5132548
- Report Number(s):
- NUREG/CR-2314; SAND-81-1906; ON: DE82015449
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360406 -- Materials-- Polymers & Plastics-- Radiation Effects-- (-1987)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ADDITIVES
AGING
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
COMBUSTION PROPERTIES
CORRELATIONS
DATA
DECOMPOSITION
DOSE RATES
ELASTOMERS
ELONGATION
ESTERS
EXPERIMENTAL DATA
FIRE RESISTANCE
FLAMMABILITY
IGNITION
INFORMATION
KINETICS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
POLYETHYLENES
POLYMERS
POLYOLEFINS
PYROLYSIS
RADIATION EFFECTS
REACTION KINETICS
RUBBERS
SULFONIC ACID ESTERS
THERMOCHEMICAL PROCESSES