A material is flammable if it is subject to easy ignition and rapidly flaming combustion. The plastics that are most widely used are the least expensive and tend to be the most flammable. This article describes the two basic approaches to improving the fire resistance of a polymeric material: modifying or substituting the basic polymer so that exposure to heat and oxygen will not produce rapid combustion, and using flame-retardant additives. It also provides an overview of the burning process and presents two flammability test methods.
Andrew Lock, Flammability Testing of Plastics, Characterization and Failure Analysis of Plastics, Vol 11B, ASM Handbook, Edited By Todd J. Menna, ASM International, 2022, p 213–217, https://doi.org/10.31399/asm.hb.v11B.a0006914
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