Accession Number:

AD0269203

Title:

PENTABORANE THERMAL STABILITY AT TEMPERATURES OF 100 DEGREES C, 125 DEGREES C AND 150 DEGREES C FOR 7 PERCENT ULLAGE

Descriptive Note:

Corporate Author:

CALLERY CHEMICAL CO PA

Personal Author(s):

Report Date:

1961-12-21

Pagination or Media Count:

1.0

Abstract:

The thermal stability of B5H9 was determined as the rate of pressure increase in 800-ml test cylinders filled to 7 ullage. Decomposition of the B5H9 resulted in pressure increases from 3 to 1200 psig approximately 6 decomposition of B5H9 at temperatures of 100, 125 and 150 C after 360, 28 and 3 hr, respectively. At long hold times and high temperatures the predicted percent decomposition was higher than the observed percent decomposition. Investigations were made to determine the effects of H and B10H14 on pentaborane thermal stability after 138 hr, at a temperature of 110 C and an ullage of 52. The addition of 26.8 mol- H approximately 1175 psig for one test and 9.2 mol- B10H14 for another test resulted in 6.5 and 8.1 decomposition. A blank B5H9 test resulted in a 10.3 decomposition. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE