Accession Number : AD0243387


Title :   EVALUATION OF EXPERIMENTAL POLYMERS


Descriptive Note : Rept. for Mar 1959-Mar 1960


Corporate Author : GENERAL ELECTRIC CO SCHENECTADY NY


Personal Author(s) : DOYLE, CHARLES D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/243387.pdf


Report Date : Jun 1960


Pagination or Media Count : 121


Abstract : Thermogravimetric analysis (TGA) in dry N2 is considered in detail as a method for comparing the intrinsic thermal stabilities of experimental polymers on both empirical and fundamental grounds. Two procedural decomposition temperatures are defined and discussed. One, the differential procedural decomposition temperature (dpdt), is based on the locations of recognizable curve features, while the second, the integral procedural decomposition temperature (ipdt), is based on areas under the curve. Kinetic analysis of volatilization data is discussed on the basis of both the Arrhenius rate equation and its integral. Two quasi-kinetic methods are discussed, one based on empirical time-temperature superposition; the other, on an empirical relationship between isothermal times and temperatures in TGA. Two corroborative test methods, differential thermal analysis and thermoparticulate analysis are discussed briefly. TGA curves and tables of data on 54 polymers are presented.


Descriptors :   *HEAT RESISTANT PLASTICS , *THERMOGRAVIMETRIC ANALYSIS , TEST METHODS , THERMAL STABILITY , PARTICLES , GRAVIMETRIC ANALYSIS , DECOMPOSITION , DIFFERENTIAL THERMAL ANALYSIS , ARRHENIUS EQUATION


Subject Categories : Polymer Chemistry
      Plastics


Distribution Statement : APPROVED FOR PUBLIC RELEASE