Rigid PVC heat stabilizers
Rigid PVC heat stabilizers decription: PVC heat stabilizers for PVC and other chlorine-containing polymer. It was discovered that PVC plastic molding processing only in the more than 160 ℃, and it started at 120 to 130 ° C thermal decomposition, the release of HCl gas, if not suppression of HCl production, decomposition will further exacerbate this problem has troubled PVC plastic development and application of the main challenges.
The study found that PVC plastics containing a small amount of lead salts, metal soap, phenols, aromatic amines and other impurities will not affect the processing and application, but also to some extent, delaying the role of the thermal decomposition. The above problems are resolved, thus contributing to the establishment and continuous development of the research areas of the heat stabilizer.
PVC is vinyl chloride monomer by free radical initiated polymerization. In the reaction, the molecular chain in the growth process, the chain transfer reaction occurs and generated tertiary carbon atom connected with the tertiary carbon atom of chlorine atoms and hydrogen atoms due to electron cloud distribution of density while the bond energy is low, a lively atoms, it is easy to take off an adjacent H and Cl of HCl.
PVC resin is purely the linear structure, but are secondary carbon atoms combined with the chlorine atom, then its stability is better.
But in fact, the high purity of the PVC resin, in the 100 ° C above the beginning decomposition of HCl, which indicates its molecular structure, there are still factors of instability.
Read more:Rigid PVC heat stabilizers for sale
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