CARBONIZATION OF PLASTICS AND REFRACTORY MATERIALS RESEARCH PROGRAM. Third Quarterly Progress Report for period July 1, 1960-September 30, 1960
The efforts applied to and the results obtained from investigations of (l) the rate and mechanism of plastics carbonizations, (2) the vapor pressures of refractory materials, and (3) the spectral emissivities of refractory materials are summarized. Work has progressed on each of the three complementary approaches used in studying the carbonization of plastics. Results from thermogravimetric studies of the process have shown that carbon yields from molded buttons of a phenolic resin and a polyphenylvene plastic are greater than from loose powders of these same plastics. Arc-imagve furnace experiments were conducted with molded buttons of a strongly cross-linked polyethylene, polyphenylene, polynaphthslene, and phenolic resins separately reinforced with titanium power, tantalum power and niobium turnings. Results show that the polyethylene did not carbonize and that the coke layer formed with reinforced phenolic is denser than from straight phenolic. Differences in analysis of gaseous products from polyphenylenve and polynaphthslene are given. Vaporpressure studies by Langmuir evaporation continue. Work on ZrC is nearly complete; studies with WC have been initiated. Results of ZrC vaporization show excellent agreement with values calculated from low-temperature thermodynamic functions. Emissivity work was devoted primarily to W-2 coated molybdenum and to siliconized ATJ graphite. Emissivities are given for these materials at various temperaturves over the wavelength of 1 to 6 mu (For preceding period see AD- 236160.) (auth)
- Research Organization:
- General Electric Co. Flight Propulsion Lab. Dept., Cincinnati
- DOE Contract Number:
- AF33(616)-6841
- NSA Number:
- NSA-15-002566
- OSTI ID:
- 4125301
- Report Number(s):
- NP-9417
- Resource Relation:
- Other Information: Project No. 4776. Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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