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The Molecular Weight Of Chlorinated Polyethylene Has A Significant Effect On Its Physical Properties

Weifang Yaxing Chemical Co.,Ltd | Updated: Aug 11, 2017

The molecular weight of Chlorinated Polyethylene has a significant effect on its physical properties
The physical and mechanical properties of Chlorinated Polyethylene are not only closely related to the molecular weight, but also to the distribution of molecular weight. The more the molecular weight distribution is, the more easily flow under high shear, the die pressure of the extruder is reduced during molding, and the appearance of the molded article is good, but the impact strength and resistance to stress cracking are reduced. The properties of Chlorinated Polyethylene are mainly determined by molecules with large molecular weights.
The molecular weight of Chlorinated Polyethylene has a significant impact on its physical properties, such as strength, hardness, toughness, aging resistance, and fluidity. The need for higher molecular weight in order to make the product has sufficient strength, but the molecular weight is too large will lead to too much viscosity, difficult to process.
 Chlorinated Polyethylene is a kind of chlorinated polymer obtained by chlorination of high density polyethylene (HDPE), which can be divided into resin type Chlorinated Polyethylene (depending on its chlorine content, residual crystallinity and other characteristics) CPE) and rubber type Chlorinated Polyethylene (CM). CPE in the structure contains a certain amount of residual crystals, CM basically does not contain residual crystals.
       Chlorinated Polyethylene series of applications and performance:
CPE135A: good flexibility, good low temperature toughness, with high strength, high filling and good impact resistance;
                   Can be used for doors and windows profile, plastic pipe and pipe fittings, sheet metal and other hard PVC products.
CPE135B: high toughness, high elasticity, high elongation, low temperature toughness, good oil and flame retardant properties;
                   For flame retardant wire and cable sheathing, flame retardant conveyor belt, mine cables, waterproofing membrane and other fields.
CPE130A: has good softness, excellent low temperature performance, good filling, anti-aging, chemical resistance, good processing performance;
                   Can be used to produce refrigerator magnetic stripe, cold cable jacket, can also be used as a special rubber for the production of rubber products.
CPE140A: high mechanical strength, good toughness, aging resistance and mobility, and PVC compatibility is good;
                   For PVC calendar film, PVC waterproofing membrane, and PVC efficient plasticizer and flame retardants.
Chlorinated Polyethylene is a high-density polyethylene chloride from the synthesis of a good performance of the polymer material, the formula [CH2-CHCl-CH2-CH2] n. White particles, soluble in aromatic hydrocarbons and halogenated hydrocarbons, insoluble in aliphatic hydrocarbons. More than 170 ℃ above decomposition, with excellent weather resistance, low temperature performance and electrical properties; resistance to ozone; chemical resistance, oil resistance; flame retardant; also has good processing mobility and good with other plastic and rubber phase Capacitive. Chlorine content of 25 to 45%.
Application areas:
     As a good modifier and additive for plastics and rubber, CPE has a wide range of industries such as plastic doors and windows, PVC pipe and sheet, waterproofing membrane, anticorrosive coating, wire and cable, magnetic material, flame retardant hose, tape and ABS modification Applications. Such as PVC modifier; PP, PE, PS, ABS and other toughening agents and flame retardants; products are refrigerator magnetic tape, cold wire and cable sheathing, waterproofing membrane, flame retardant conveyor belt, plastic profile, Color bike belt and so on.
production method:
Chlorinated Polyethylene production is divided into solvent chlorination, suspension chlorination and solid chloride. At present, the suspension chlorination process has been developed to acid phase chlorination process, water phase suspension chlorination process, solution suspension chlorination process; solid phase suspension chlorination process is divided into stirring bed solid phase chlorination process, boiling bed solid phase chlorination process The