Combustion experiments and properties

1. Material combustion performance parameters 
Materials need to be to illustrate various parameters, the combustion performance of common parameters are as follows. 
The nature of the ignition source ease of ignition 
The spread of flame and continue 
The effects of the spread rate of direction lighting direction 
Degree of burning rate of sample consumption rate of the flame is extinguished smoldering properties 
energy 
The total energy emitted by the energy release rate, mass loss rate 
The rate of energy transfer to the adjacent surface 
Combustion products 
Product gas composition and concentration of the smoke and the smoke density 
Toxicity of gaseous product of the nature of the nature of the combustion residue carbon 
2. Material combustion performance experiment method classification 
According to the combustion process are tested on different parameters, test can be divided into: ease of ignition test; Flame spread test; Heat release test; Combustion performance test; Oxygen concentration test; Degree of smoke test; And other performance test. 
(1) ease of ignition 
Most organic polymer in the presence of the right amount of oxidant, such as give enough heat (temperature) and a long enough time can be ignited, in principle, control two is changeless, by the third can at least half the ease of ignition can be measured quantitatively. Many test is actually qualitative, because they are in the oxygen concentration, heating, and time under the fixed condition of measuring whether the lighting. 
(2) the flame spread 
This kind of test measure is lit, the material according to material combustion degree, time, and the burning rate to evaluate. Method according to the exposed surface and the Angle between the horizontal and classification. 
(3) heat release test 
Such trials are burning material contribution of heat, this is usually measured relative. 
(4) oxygen concentration test 
Is also called the oxygen index test. 
(5) this kind of test usually involves end-use system rather than individual material. So often on a large scale simulation test. 
(6) material degree of combustion smoke test 
Polymer materials are measured amount of smoke when burning. 
(7) combustion products toxicity hazard test 
With chemical method, physical method and biological method to study the toxicity of combustion products. 
(8) other performance standard test 
In the world, different countries have different standards: American insurance institute UL standard, industry association, Canada CSA standard, Japanese industrial standard JISL1901-77, British BS standards, and so on. U.S. insurance laboratory ANSI/UL - 94-1985 standard is internationally recognized and widely adopted standards. The above all kinds of experiments, in order to easy to ignite, flame spread speed, oxygen index, smoke, and the products of combustion toxicity test is the most important. 
All kinds of materials, combustion performance experiment, the flame spread and oxygen index experiments can be expressed flammable material performance. In flame spread in vertical, horizontal, 45 degrees of inclined method and so on. The vertical combustion method is one of the most commonly used method. 9 lzgquo