AN ANALYTICAL GAS CHROMATOGRAPH FOR PRODUCTS OF ISOTHERMALLY DEGRADED POLYMERS
NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA SAN FRANCISCO
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A commercial gas chromatograph was modified to simultaneously analyze parallel inputs of organic compounds and fixed gases originating as the degradation products of isothermally pyrolyzed alpha-cellulose. The pyrolysis chamber and a complex gas-handling system for separating and concentrating the pyrolyzates were attached directly to the chromatograph cabinet, and a complete system of temperature control zones was established. A detailed description of the arrangement and operation of 1 an isothermal pyrolysis chamber for sample generation, 2 a temperature control and valving system for sample separation and concentration, and 3 a parallel liquid partition and solid adsorption gas chromatography system for sample analysis is presented. The technique is applied to trial analysis of the degradation products of white alpha-cellulose pyrolyzed isothermally for 10 minutes in a nitrogen-fluidized sand bath at 360 deg C.