Styrene maleic anhydride copolymer
As styrene-maleic anhydride ( DIN - Abbreviation SMA or SMAH ) are thermoplastic plastics referred mainly composed of polystyrene consist (PS) connected to maleic anhydride functionalized was.
properties
These copolymers have a significantly higher temperature resistance than pure polystyrene. They are mainly used in the automotive industry , but also for tool housings and household and garden tools. In the case of terpolymers from SMA with other components, this is sometimes used under the name High Impact Styrene-Maleic Anhydride Terpolymer (HISMA) as a compatibilizer for incompatible plastic blends , such as mixtures of polyamide and ABS plastics, but also as a high-impact coating.
The production of SMA copolymers takes place through bulk polymerisation.
They have high strength and rigidity as well as high impact strength . These properties can be optimized by adding the plastic acrylonitrile butadiene styrene (ABS). Such mixtures are also known as polymer - Blends referred - in this case, polymer blend of ABS + SMA.
use
Styrene maleic anhydride is mainly used in the automotive industry for cladding in vehicle interiors.
Typical examples are the dashboard or dashboard , the thermoformable headliner in cars and hubcaps . Other applications include the manufacture of headlight housings , plumbing equipment and parts for washing machines and vacuum cleaners .
Individual evidence
- ↑ H. Domininghaus: The plastics and their properties , p 289, VDI-Verlag GmbH, ISBN 9783540214106 .
- ↑ W. Keim (Ed.): Kunststoffe: Synthesis, Manufacturing Processes, Apparatus. P. 125, John Wiley and Sons, 2006, ISBN 9783527608362 .
- ^ GW Becker, L. Bottenbruch, R. Binsack, D. Braun: Technical thermoplastics. 4. polyamides. S. 145, Hanser Verlag, 1998, ISBN 9783446164864 .