An Exploratory Study of a New Class of Stepladder and Ladder Polymers - Polyimidazopyrrolones PDF Download
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Author: George Francis Pezdirtz
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Category : Polyimidazopyrrolone
Languages : en
Pages : 28
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Author: George Francis Pezdirtz
Publisher:
ISBN:
Category : Polyimidazopyrrolone
Languages : en
Pages : 28
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Category : Government publications
Languages : en
Pages : 778
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Author:
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Category : Aeronautics
Languages : en
Pages : 360
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Author:
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Category :
Languages : en
Pages : 332
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Author: Allen G. McLain
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Category : Ablative materials
Languages : en
Pages : 44
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Two 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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Author: United States. Small Business Administration
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Category :
Languages : en
Pages : 422
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Author: United States. Superintendent of Documents
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Category : Government publications
Languages : en
Pages : 758
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Author:
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ISBN:
Category :
Languages : en
Pages : 420
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Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
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Category : Aeronautics
Languages : en
Pages : 2300
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2084
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