Styrene maleic anhydride (SMA or SMAnh) is a synthetic polymer that is built-up of styrene and maleic anhydride monomers. The monomers can be almost perfectly alternating, making it an alternating copolymer, but (random) copolymerisation with less than 50% maleic anhydride content is also possible. The polymer is formed by a radical polymerization, using an organic peroxide as the initiator. The main characteristics of SMA copolymer are its transparent appearance, high heat resistance, high dimensional stability, and the specific reactivity of the anhydride groups. The latter feature results in the solubility of SMA in alkaline (water-based) solutions and dispersion.
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| - Styreen-maleïnezuuranhydride (nl)
- Styrene maleic anhydride (en)
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| - Styreen-maleïnezuuranhydride (SMA) (CAS-nummer: 9011-13-6) is een thermoplastisch copolymeer van styreen en maleïnezuuranhydride (MA). Wanneer men evenveel styreen als MA gebruikt krijgt men een vrijwel perfect alternerend copolymeer, met afwisselend een styreen- en een MA-groep. In de praktijk gebruikt men meestal minder MA dan styreen omdat het polymeer dan beter verwerkbaar is. De eigenschappen van een SMA-copolymeer hangen af van het molecuulgewicht en de verhouding styreen/MA in het polymeer. Styreen is niet-polair en MA is polair en de verhouding tussen beide bepaalt de polariteit van het polymeer. (nl)
- Styrene maleic anhydride (SMA or SMAnh) is a synthetic polymer that is built-up of styrene and maleic anhydride monomers. The monomers can be almost perfectly alternating, making it an alternating copolymer, but (random) copolymerisation with less than 50% maleic anhydride content is also possible. The polymer is formed by a radical polymerization, using an organic peroxide as the initiator. The main characteristics of SMA copolymer are its transparent appearance, high heat resistance, high dimensional stability, and the specific reactivity of the anhydride groups. The latter feature results in the solubility of SMA in alkaline (water-based) solutions and dispersion. (en)
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| - Styrene maleic anhydride (en)
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| - Styrene maleic anhydride (en)
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| - Styrene maleic anhydride.png (en)
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| - Styrene maleic anhydride (SMA or SMAnh) is a synthetic polymer that is built-up of styrene and maleic anhydride monomers. The monomers can be almost perfectly alternating, making it an alternating copolymer, but (random) copolymerisation with less than 50% maleic anhydride content is also possible. The polymer is formed by a radical polymerization, using an organic peroxide as the initiator. The main characteristics of SMA copolymer are its transparent appearance, high heat resistance, high dimensional stability, and the specific reactivity of the anhydride groups. The latter feature results in the solubility of SMA in alkaline (water-based) solutions and dispersion. SMA is available in a broad range of molecular weights and maleic anhydride (MA) contents. In a typical combination of those two properties, SMA is available as a crystal clear granule that can be used in a wide variety of applications. SMA polymers with a high molecular weight are widely used in engineering plastic applications, normally in the impact modified and optional glass fibre filled variants. Alternatively, SMA is applied using its transparency in combination with other transparent materials like PMMA or the heat resistance to heat-boost other polymers materials like ABS or PVC. The solubility of SMA in alkaline solutions makes it suitable for various applications in the field of sizings (paper), binders, dispersants and coatings. The specific reactivity of SMA makes it a suitable agent for compatibilizing normally incompatible polymers (e.g. ABS/PA blends) or cross-linking.The glass transition temperature of Styrene maleic anhydride is 130 - 160 °C. (en)
- Styreen-maleïnezuuranhydride (SMA) (CAS-nummer: 9011-13-6) is een thermoplastisch copolymeer van styreen en maleïnezuuranhydride (MA). Wanneer men evenveel styreen als MA gebruikt krijgt men een vrijwel perfect alternerend copolymeer, met afwisselend een styreen- en een MA-groep. In de praktijk gebruikt men meestal minder MA dan styreen omdat het polymeer dan beter verwerkbaar is. De eigenschappen van een SMA-copolymeer hangen af van het molecuulgewicht en de verhouding styreen/MA in het polymeer. Styreen is niet-polair en MA is polair en de verhouding tussen beide bepaalt de polariteit van het polymeer. (nl)
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| - Poly(Styrene-co-Maleic Anhydride) (en)
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