PP (CO Polymer)
PP (CO Polymer) molecule is very similar to the polyethylene molecule, but it also has minor differences. The most popular commercial type of polypropylene is its isotactic type. To produce this polymer, when polymerizing the material and reaching this regular arrangement, it is necessary to Catalyst. Differences between heavy polyethylene and polypropylene are important aspects that make them different in their applications. PP is tighter than PE.
When the product needs more stiffness or requires more abrasion (such as gears, toys, car batteries, and car seats, use PPs).
PP (CO Polymer) properties:
One of the major properties of PP that has contributed to the growth of this product:
- High rigidity, low density, high tensile strength, good transparency, resistance to environmental stress (ESCR), chemical resistance and high-temperature resistance (melting point 170 ° C)
- Having good mechanical strength properties in filler and reinforcement materials. Also, for many applications, this mixture can compete with expensive engineering polymers.
- Good molding properties
- Stretchable and directional.Also, this property can be used in the production of fibers and films.
PP (CO Polymer) applications:
- Packaging of stationery
- Packaging of food
**Different types of polypropylene include homopolymer and copolymers are different in their application.
Homopolymer are more rigorous and more resistant to copolymers at high temperatures. But the impact strength of the homopolymer at a temperature below zero is very limited.
Copolymers have two categories: Random copolymers and Block copolymers. As a result, The difference between the two is in the structure and polymeric chains of Athas and their applications are different.**