Accession Number : AD0866665

Title :   Pyrolysis of Rayon Treated with Bis(chlorodiphenylphosphine)-Decaborane and Dimeric Chlorophospha (III)-o-Carborane.

Descriptive Note : Interim rept. Nov 68-Jun 69,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Duffy, James V.

Report Date : 10 FEB 1970

Pagination or Media Count : 17

Abstract : The treatment of rayon yarn with bis(chlorodiphenylphosphine)- decaborane (BCDPD) or dimeric chlorophospha (3)-o-Carborane (DCPC) results in an increase in the char yield of the pyrolyzed yarns. In the case of untreated rayon, weight retention at 800 degrees C is 20%, whereas the treated yarns yield boronated residues of 42-53%. Carbon yields as high as 28% have been obtained with the BCDPD TREATMENT. This treatment also results in substantial improvement in the oxidative stability of rayon at temperatures up to 250 degrees C. (Author-PL)

Descriptors :   *CARBON FIBERS, *RAYON, PREPARATION, PYROLYSIS, HEAT RESISTANT MATERIALS, DECABORANES, PHOSPHINE, GRAPHITE, COMPLEX COMPOUNDS.

Subject Categories : Textiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE