Accession Number : AD0715358

Title :   Kinetic Study on Polyphenylene Oxide,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : Katzenstein,Rainer J.

Report Date : SEP 1970

Pagination or Media Count : 51

Abstract : The Arrhenius activation energy and reaction rate constants for PPO, both unfilled and filled with 30-percent glass fiber, were determined by isothermal and by temperature programmed TGA methods and found to be 45.5, 38.9, 43.1, and 35.6 kcal, respectively. The activation energy as determined by TGA METHODS IS 2 TO 3 KCAL LOWER THAN THAT DETERMINED BY THE MORE ACCURATE BUT TEDIOUS ISOTHERMAL METHODS. This is in accordance with comparable TGA data published in the literature. The Arrhenius equation was utilized to predict the thermal loss of glass-filled PPO at elevated temperatures. At maximum temperature that the nose cone of a projectile would see in flight, the loss could be as high as 90 percent on 0.5 sec. (Author, modified-PL)

Descriptors :   (*HEAT RESISTANT PLASTICS, *DECOMPOSITION), (*REINFORCED PLASTICS, DECOMPOSITION), PYROLYSIS, REACTION KINETICS, THERMAL STABILITY, DIFFERENTIAL THERMAL ANALYSIS, GLASS TEXTILES

Subject Categories : Physical Chemistry
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE