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Statements

Subject Item
dbr:Styrene_maleic_anhydride
rdf:type
yago:Relation100031921 yago:Anhydride114767291 dbo:ChemicalSubstance yago:Substance100019613 yago:Matter100020827 yago:WikicatCopolymers n15:ChemicalObject yago:Material114580897 yago:Chemical114806838 owl:Thing yago:Compound114818238 wikidata:Q11173 yago:Part113809207 yago:Abstraction100002137 yago:WikicatAcidAnhydrides yago:Copolymer114902949 yago:Polymer114994328 yago:PhysicalEntity100001930 dbo:ChemicalCompound
rdfs:label
Styreen-maleïnezuuranhydride Styrene maleic anhydride
rdfs:comment
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. 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.
foaf:name
Styrene maleic anhydride
dbp:name
Styrene maleic anhydride
foaf:depiction
n6:Styrene_maleic_anhydride.png
dcterms:subject
dbc:Copolymers
dbo:wikiPageID
16454443
dbo:wikiPageRevisionID
1060190127
dbo:wikiPageWikiLink
dbr:Styrene dbc:Copolymers dbr:Acrylonitrile_butadiene_styrene dbr:Copolymer dbr:Vas_deferens dbr:Organic_peroxide dbr:Dimethylsulfoxide dbr:Vasectomy dbr:PVC dbr:Reversible_inhibition_of_sperm_under_guidance dbr:Poly(methyl_methacrylate) dbr:Molecular_weight dbr:Monomers dbr:Nova_Chemicals dbr:Condom dbr:Radical_polymerization dbr:Maleic_anhydride dbr:Glass_fibre dbr:Polymer
dbo:wikiPageExternalLink
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dbt:More_citations_needed dbt:Reflist dbt:Cascite dbt:Plastics dbt:Chembox_Identifiers dbt:Chembox dbt:Chembox_Properties
dbo:thumbnail
n6:Styrene_maleic_anhydride.png?width=300
dbp:imagefile
Styrene maleic anhydride.png
dbp:imagename
Styrene Maleic Anhydride
dbp:imagesize
200
dbp:iupacname
Poly
dbp:othernames
SMA; XIRAN
dbp:verifiedrevid
451677340
dbo:abstract
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. 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.
gold:hypernym
dbr:Polymer
prov:wasDerivedFrom
wikipedia-en:Styrene_maleic_anhydride?oldid=1060190127&ns=0
dbo:wikiPageLength
4709
dbo:alternativeName
SMA; XIRAN
dbo:iupacName
Poly(Styrene-co-Maleic Anhydride)
foaf:isPrimaryTopicOf
wikipedia-en:Styrene_maleic_anhydride