What factors can affect the decomposition temperature of chlorinated polyethylene?

Chlorinated polyethylene is a non-toxic and odorless white powdery saturated polymer material, which has many properties such as weather resistance, ozone resistance, chemical resistance, aging resistance, oil resistance, flame retardancy, coloring resistance, etc. It also has good toughness and good compatibility with other polymer materials. It is widely used in many production fields such as wires and cables, automotive parts, hydraulic hoses, etc. It is a part of today's modern society.

Chlorinated polyethylene is a modified chlorinated polymer produced by chlorination of high-density polyethylene. The chlorine content is generally controlled between 30% and 50% (mass ratio), and decomposition reactions occur above 170 degrees Celsius, releasing HC1 gas. However, in practical production applications, chlorinated polyethylene often begins to decompose before reaching 170 degrees Celsius. So, what are the main factors affecting its decomposition temperature?

Firstly, the chlorine content affects the properties of chlorinated polymers and is closely related to their chlorine content. The higher the chlorine content, the easier it is to decompose.

Secondly, the decomposition temperature of pure chlorinated polyethylene is also closely related to its purity. If catalysts, initiators, acids, bases, etc. added during the polymerization process cannot be completely removed, or if moisture is absorbed during transportation, it will to some extent reduce the stability of chlorinated polyethylene and accelerate its decomposition.

Thirdly, if a small amount of flame retardant material is added to chlorinated polyethylene as an additive, its stability can be improved to some extent. Otherwise, its stability will be reduced and its decomposition rate will be accelerated.