Accession Number : ADA307208

Title :   Exploratory Investigation of the Effect of Nylon Grain Size on Ablation of Phenolic Nylon.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Walberg, Gerald D. ; Crouch, Roger K.

PDF Url : ADA307208

Report Date : AUG 1966

Pagination or Media Count : 43

Abstract : In the present investigation, two series of powdered-nylon-phenolic-resin test specimens were subjected to a Mach 2 air stream which had a stagnation pressure of approximately tOO psia (0.69 MN/sq m), and stagnation temperatures from 2300 deg R to 3600 deg R (1278 deg K to 2000 deg K). The first series of test specimens contained nylon having a grain size larger than 0.0098 inch (0.25 mm), and the second series contained nylon having a grain size smaller than 0.0017 inch (0.043 mm). Both series of test specimens were also tested in nitrogen in an effort to determine the importance of oxidation as a char-removal mechanism.

Descriptors :   *NYLON, *GRAIN SIZE, *PHENOLIC PLASTICS, REENTRY VEHICLES, ABLATION, POWDERS, HIGH TEMPERATURE, OXIDATION, HEAT SHIELDS, ENTHALPY, STAGNATION TEMPERATURE, PYROLYSIS, THERMAL RESISTANCE, HEAT RESISTANT MATERIALS, CHARRING.

Subject Categories : Plastics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE