Copolymers
Description (definition)
Copolymers are polymers that consist of two or more different monomers. Unlike homopolymers, which are composed of only one type of monomer, copolymers combine the properties of the individual monomers, resulting in improved or new material properties. This versatility makes copolymers a common choice in the automotive, construction and packaging industries. One well-known copolymer is acrylonitrile butadiene styrene (ABS), which is valued for its high impact strength and stability.
Example
A typical example is ethylene-vinyl acetate (EVA), a copolymer used in the footwear industry for flexible and shock-absorbing soles. Its combination of elasticity and durability ensures comfort and longevity.
How do copolymers differ from homopolymers?
Copolymers consist of at least two different monomers, while homopolymers are only made up of a single monomer. By combining different monomers, copolymers can offer specific properties such as greater flexibility, impact strength or chemical resistance, which homopolymers do not have.
What types of copolymers are there?
There are different types of copolymers, including
1. block copolymers: the monomers are arranged in blocks.
2. random copolymers: the monomers are randomly distributed.
2. graft copolymers: one type of monomer forms the main strand, while another acts as a side chain.
Each type has specific properties and areas of application.
Where are copolymers used?
Copolymers are used in the packaging industry (e.g. for flexible films), in the automotive industry (e.g. for impact-resistant components) and in medicine (e.g. for catheters). They offer a combination of flexibility, durability and chemical resistance that can be tailored to specific requirements.