Method of selecting flame retardants for polymers

Chemistry: physical processes – Physical processes – Crystallization

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232303, 324321, 422 78, G01N 2408

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active

043068782

ABSTRACT:
A method for selecting a flame retardant for a polymer comprises using cross polarization and magic-angle sample spinning techniques to record well resolved .sup.31 P and .sup.13 C nuclear magnetic resonance spectra of the polymer before and after ignition; recording .sup.31 P and .sup.13 C NMR spectra of the combination of polymer and a known flame retardant before and after ignition; characterizing the chemical and physical changes that occur in the flame retardant and the polymer upon ignition and thereby determining the chemical basis by which the known flame retardant is operating and using that knowledge to select another flame retardant that will be effective for use with the polymer.

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ASTM D2863-70; May 8, 1970; "Standard Method of Test for Flammability of Plastics Using the Oxygen Index Method"; pp. 719-722.
Rev. Sci. Instrum., vol. 48, No. 10 (Oct. 1977); "NMR Probe for Combined Homonuclear Multiple Pulse Decoupling & Magic Angle Spinning"; Pembleton et al.; pp. 1286-1289; American Institute of Physics.
Journal of Applied Physics; vol. 22, No. 6 (6/1951); Nuclear Magnetic Resonance Study of Transitions in Polymers; Holroyd et al.; pp. 696-705.

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