Copolymers

The polypropylene copolymer production process involves adding a comonomer, which in our case is ethylene and which offers a higher flexibility to the polymeric chain, thus increasing the shock resistance and decreasing the fragility point of the resin. Depending on the way the ethylene molecule is incorporated into the main chain of polypropylene, copolymers can be classified as random or block.

Random Copolymers: They are obtained by the random incorporation of the ethylene in the production process. This comonomer appears in irregular sequences along the main chain.

Random copolymers are semi-crystalline polymers which are characterized by a high transparency level and an improved shock resistance compared to a homopolymer. They are used mainly in applications that require high transparency levels and a higher flexibility.

Block or Impact Copolymers: They are obtained by adding in blocks ethylene in the production process. Their molecular structure consists of a homopolymer continuous phase and another heterogeneous phase with elastomeric characteristic. The impact copolymers are highly rigid, show excellent shock resistance at room temperature and even at extremely low temperatures. They are used mainly in applications that require high impact resistance.