Method to determine carbon black content

Details Method to determine carbon black content Method to determine carbon black content

1981-01-09

1983-06-14

Marcus, Michael S.

Chemistry: analytical and immunological testing

Synthetic or natural resin

436126, 436157, 436908, G01N 2500, G01N 3344

Patent

active

043884105

ABSTRACT:
A method for thermogravimetrically analyzing a plastic molding composition comprising carbon black and a vinyl chloride homopolymer or copolymer molding resin to determine the carbon black content wherein the method comprises the steps of compounding the molding composition so that the carbon black is uniformly dispersed therein, heating the molding composition in an inert atmosphere to a temperature sufficient to reproducibly thermally decompose the vinyl chloride homopolymer or copolymer, maintaining the molding composition at the decomposition temperature in an inert atmosphere for a first given time which is long enough so that there is no further significant weight loss, weighing the molding composition to determine the weight loss during the first given time and comparing the weight loss for the first given time with that for samples of known composition analyzed under the same conditions to determined the carbon black content of the molding composition.

REFERENCES:
Thermochimica Acta 26 (1978), 349-359-Schwartz et al.
Microprocessor-Controlled Thermogravimetric Separations, Cassel et al., Thermochim. Acta. 36, 3, 265-77, 1980.
Charsley et al., Plast. Rubber Process Appl., 81, 1(1), 3-7.
Collins-"Application of Thermal Analysis to the Study of Elastomers", Characterization of Thermoplastic Polymers, E. I. DuPont, 1970.

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