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Discussion On The Action Mechanism Of Flame Retardants In Environmental Protection PVC Heat Stabilizer

Time： 2022-02-21

Summary: The action mechanism of flame retardants in environmentally friendly PVC thermal stabilizers is generally complex, and the flame retardants of the same flame retardants in different polymers sometimes have some differences. The mechanism classification of PVC heat stabilizer and flame retardant can be summarized as follows

The action mechanism of flame retardants in environmentally friendly PVC thermal stabilizers is generally complex, and the flame retardants of the same flame retardants in different polymers sometimes have some differences. The mechanism classification of PVC heat stabilizer and flame retardant can be summarized as follows

1. Inhibition effect; capture active radicals generated by polymer combustion, thus inhibiting chain locking reactions of active radicals; weaken combustion

2. Chain transfer effect; flame retardants in PVC heat stabilizer alter the combustion mode of polymer materials, and inhibit the production of combustible gases

3. The coverage effect is the same; the inert gases released by flame retardants are insulated from the contact between combustible gases and oxygen in the gas phase, or solid carbon layer or liquid film is formed on the polymer surface, preventing the escape of combustible gases

4. Dilute the concentration of oxygen and combustible gases produced by the heat decomposition of dilutive flame retardants, making them unable to reach the necessary conditions for continued combustion

5, heat absorption effect, flame retardant decomposition absorb a lot of heat burning, polymer material temperature rise difficult.

Keywords： Discussion On The Action Mechanism Of Flame Retardants In Environmental Protection PVC Heat Stabilizer