Propagation index

A simple method for assessing the ability of a particular composition to bum under adverse conditions is the propagation index, originally proposed by McLain and later modified by Rose. The original McLain expression was 

Flame Pmpagation Parameters of Pyrotechnic Delay and Ignition Compositions, Report IHMR 71-168, Naval Ordnance Station, Indian Head, MD, 1971. 

de Yong and F. Lu, Radiative ignition of pyrotechnics Effect of wavelength on ignition threshold. Propellants, Explosives, Pyrotechnics, 23, 328 (1998). 

Shidlovskiy, Principles of pyrotechnics, 3rd ed., Moscow, 1964. (Translated by Foreign Technology Division, Wright-Patterson Air Force Base, Ohio, 1974.) 

Barton et al.. Factors affecting the ignition temperature of pyrotechnics, in Proceedings, Eighth International Pyrotechnics Seminar, Steamboat Springs, CO ITT Research Irrstitute, July 1982, 99. 

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Fire Propagation. It has been shown that the fire propagation behavior can be quantified using a Fire Propagation Index (FPI)... 

Table V. Peak Fire Propagation Index Values for Fiber Reinforced Composite Materials...

TABLE 5,12 Propagation Index VsJuee for PyTotGctinie Mixtures ... 

Com position i by wefgiit Tieflt of reaction, cal / gram Igniifort temperature. Propagation index feel /g-°C)... 

The fire propagation index (overall performance) of the material (/) is calculated from the individual results of each tests as follows ... 

Ignition time and release rates of heat and products are measured in the tests. The fire propagation behavior of polymers is expressed in terms of a fire propagation index (FPl) [21, 22, 40, 78, 80] ... 

Table 11.26 Estimated Fire Propagation Index and Smoke Development Index for Polymers from Parts of a Minivan ...

Table 11.27 Fire Propagation Index from Small-Scale Tests (ASTM E2058) and Mode and Extent of Propagation in Large-Scale Parallel Panel Tests for Various Pol3mers ...

Fire propagation index (m/s )/(kW/m) / Heat release parameter AHcb/ Hg, kJ/kJ) Product generation parameter (y>j/AHg g/kJ) Thermal response parameter (kW s /m )... 

Flame propagation rate Fire propagation index (FPI)... 

FLAME PROPAGATION LIMITING OXYGEN INDEX AND FIRE PROPAGATION INDEX... 

FIGURE 53.3. Fire propagation index versus time for a 10 mm thick, 100 mm wide, and 600 mm iong vertical slab of fire retarded polypropyiene in co-fiowing air with 40% oxygen concentration. The sides and back of the siab were covered tightly with ceramic paper and heavy duty aluminum foil. The data were measured in the ASTM E 2058 FPA. 

As a results of the rapid increase in the fire model there is a great demand for the fire property and specialized test methods. New test methods have been developed such as [36] cone calorimeter, heat release measurements, etc. With these methods, the following fire properties have been measured for PO critical heat flux, thermal response parameter surface radiation loss, heat of gasification, flame heat flux limit, yield of products, heat of combustion, corrosion index, flame extinction index, fire propagation index, etc. [37]. 

Figure 9.6. Interference of the propagative index gratings (arising from electrostrictive density changes) with the diffusive 9 (but not propagative) thermal grating.

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