Accession Number : ADA195934

Title :   Development of Computer-Controlled Thermogravimetric Instrumentation for Measurement of Environmental and High Temperature Volatilization and Desorption of Contaminants from Polymeric Materials.

Descriptive Note : Technical rept. Oct 83-Mar 86,

Corporate Author : CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD

Personal Author(s) : Shuely, Wendel J. ; McHugh, Vincent M. ; Ince, Brian S.

Report Date : APR 1988

Pagination or Media Count : 28

Abstract : A conventional thermogravimetric analyzer was modified and computerized to provide an environmental chamber adequate for comparative measurement of diffusion and evaporation of liquids from polymers. The computer-instrument system supplements complex and expensive environmental wind tunnel research for preliminary measurements of relative rates of processes at both environmental and high temperatures and under atmospheric conditions. The diffusion and evaporation transport properties of liquid-state chloroesters, diesters, organophosphates, and ether-acetates were measured in or on urethane, polyester, and methacrylate polymers. The results obtained that are of general interest to computer-oriented chemists demonstrate the enhancement of instrument performance by the computer system; the important system components are signal analysis software, kinetic computations, graphic display of rate data, and data base generation. Keywords: Desorption, Thermogravimetric, Computerized, Polymer solutions, Polymer surface, Environmental transport. (MJM)

Descriptors :   *EVAPORATION, *ORGANOPHOSPHATES, *POLYMERS, *VOLATILITY, ANALYZERS, CHAMBERS, CHEMISTS, COMPUTATIONS, COMPUTER APPLICATIONS, COMPUTER PROGRAMS, COMPUTERS, CONTAMINANTS, CONTROL, DATA BASES, DATA PROCESSING, DESORPTION, DIFFUSION, ENVIRONMENTS, ESTERS, GRAPHICS, HIGH TEMPERATURE, INSTRUMENTATION, KINETICS, LIQUIDS, MATERIALS, MEASUREMENT, METHACRYLATES, POLYESTER PLASTICS, RATES, SIGNALS, SOLUTIONS(MIXTURES), SURFACES, THERMOGRAVIMETRIC ANALYSIS, TRANSPORT, TRANSPORT PROPERTIES, URETHANES, WIND TUNNEL TESTS.

Subject Categories : Physical Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE