ABSTRACT
The flammability of natural and synthetic polymer materials is determined by the ability of such
materials to ignite and spread the combustion process. Combustion is defined as a fast, self-
accelerating exothermal redox process that is able to spread in the environment and is accompanied
by luminosity and the formation of a flame. Combustion may be of either a chain or a thermal
nature, depending on the cause of initiation and development: accumulation of active particles in
the system or the liberation of heat.
