Acrylonitrile butadiene styrene

Acrylonitrile butadiene styrene

Diagram of ABS monomers

Acrylonitrile butadiene styrene (ABS) is a common thermoplastic polymer. It is a copolymer made by polymerizing styrene and acrylonitrile in the presence of polybutadiene. ABS is known for its toughness and impact resistance, making it a popular choice for a wide range of applications.

Properties

ABS is an amorphous polymer, meaning it does not exhibit a crystalline structure. It is known for its high impact resistance and toughness, which are derived from the rubbery polybutadiene component. The styrene component provides rigidity and ease of processing, while the acrylonitrile component contributes to chemical resistance and thermal stability.

Physical Properties

ABS is opaque and can be colored easily, which makes it suitable for a variety of consumer products. It has a glass transition temperature of approximately 105 °C (221 °F).

Chemical Properties

ABS is resistant to aqueous acids, alkalis, concentrated hydrochloric and phosphoric acids, alcohols, and animal, vegetable, and mineral oils. However, it is not resistant to organic solvents such as acetone, esters, and ethylene dichloride.

Applications

ABS is used in a wide range of applications due to its versatility and ease of processing.

Consumer Products

Lego bricks made from ABS

One of the most well-known uses of ABS is in Lego bricks, which are prized for their durability and precise fit. ABS is also used in the manufacturing of musical instruments, golf club heads, and automotive components.

Automotive Industry

Citroën Méhari, a car with ABS body panels

In the automotive industry, ABS is used for manufacturing dashboards, wheel covers, and body panels. The Citroën Méhari is an example of a vehicle that utilized ABS for its body panels.

Office Equipment

Olivetti Valentine typewriter made with ABS

ABS is used in the production of office equipment such as keyboards, telephones, and typewriters. The Olivetti Valentine typewriter is a notable example of a product made with ABS.

3D Printing

3D printed object made from ABS

ABS is a popular material for 3D printing due to its strength and ease of use. It is commonly used in fused deposition modeling (FDM) printers.

Manufacturing Process

ABS is produced by the polymerization of acrylonitrile and styrene in the presence of polybutadiene. The process can be carried out using emulsion, suspension, or continuous mass polymerization techniques.

Environmental Impact

ABS is not biodegradable, which raises concerns about its environmental impact. However, it can be recycled, and efforts are being made to improve its sustainability through the development of bio-based alternatives.

Related pages

• Polymer
• Thermoplastic
• 3D printing
• Polymerization