An Exploratory Study of a New Class of Stepladder and Ladder Polymers - Polyimidazopyrrolones
Author: George Francis Pezdirtz
Publisher:
Published: 1965
Total Pages: 28
ISBN-13:
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Author: George Francis Pezdirtz
Publisher:
Published: 1965
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKAuthor: Allen G. McLain
Publisher:
Published: 1972
Total Pages: 44
ISBN-13:
DOWNLOAD EBOOKTwo Pyrrone materials, pure Pyrrone foam with a density of 481 kg/cu m and hollow glass microsphere-Pyrrone composite with a density of 962 kg/cu m, were tested in the Langley 20-inch hypersonic arc heated tunnel at pressure levels from 0.06 to 0.27 atm and heating rates from 1.14 to 11.4 MW/sq m. The 481-kg/cu m Pyrrone foam was also flight tested as an experiment aboard a Pacemaker test vehicle. The results of the ground tests indicated that the thermal effectiveness of the 481-kg/cu m Pyrrone foam was superior to the 962-kg/cu m glass sphere-Pyrrone composite. The 481-kg/cu m Pyrrone foam had approximately one-half the thermal effectiveness of low density phenolic nylon. The 481-kg/cu m Pyrrone foam experienced random mechanical char removal over the entire range of test conditions. Char thermal property inputs for an ablation computer program were developed from the ground test data of the 481-kg/cu m Pyrrone foam. The computer program using these developed char thermal properties, as well as the measured uncharred material properties, adequately predicted the in-depth temperature histories measured during the Pacemaker flight.
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Publisher:
Published: 1966
Total Pages: 1576
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DOWNLOAD EBOOKAuthor: United States. Small Business Administration
Publisher:
Published: 1966
Total Pages: 422
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DOWNLOAD EBOOKAuthor: United States. Superintendent of Documents
Publisher:
Published: 1966
Total Pages: 758
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DOWNLOAD EBOOKAuthor: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Publisher:
Published: 1967
Total Pages: 2300
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DOWNLOAD EBOOKAuthor: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
Published: 1967
Total Pages: 2084
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DOWNLOAD EBOOKAuthor: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
Published: 1966
Total Pages: 2088
ISBN-13:
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