Which is an expanded polypropylene (PP) that can be recycled right along with other In recent years, the (food) packaging industry hasĭeveloped alternative insulating plastics for thermal applications, Its low density, it takes up a relative large amount of space in The biggest problem is expandable polystyrene (EPS) due to It is a major contributor to the debris in the ocean.Īlthough recycable, polystyrene is not recycled in many parts of the Polystyrene is a not biodegradable plastic and resistant to The later is used as a cross-linking agent in a large number of different polymer materials.
Methoxystyrene, chlorostyrene, divinylbenzene and p-divinylbenzene. Produced are α-methylstyrene, o-, m-, and p-methylstyrene, However, no other styrene polymer has become a large-volumeĬommodity thermoplastic. Laboratory scale and some have been extensively investigated. Many styrene derivatives have been synthesized on a Improved heat resistance and high dimensional stability. Has a higher T g than pure polystyrene (400 - 430 K), The copolymer poly(styrene-co-maleic anhydride) (PSMA) With this monomer to an alternating structure. To increase the heat resistance, styrene is sometimes copolymerized with small amounts of maleic anhydride or it is copolymerized Has higher tensile strength than pure PS. SBS) and poly(styrene-co-acrylonitrile-co-butadiene) (ABS).īoth copolymers have very high stress and impact resistance and ABS Probably of equal importance are poly(styrene-co-butadiene) ( SBR, However, these copolymers often yield yellow products. Heat stability, and improved mechanical properties. It has much improved chemical resistance, One of the most important styrene copolymers is poly(styrene-co-acrylonitrile) (PSAN). The copolymer poly(styrene-co-methyl methacrylate) (PSMMA) has higher clarity and improved chemical and UV stability. For example, polystyrene can be copolymerized
Some of its weaknesses can be overcome by copolymerization with other monomers. Despite all these weaknesses, styrene polymers are very attractive large-volume commodity plastics. Tensile strength (35 - 55 MPa) but low impact strength (15 - 20 J/m). it has poor impact strength due to the stiffness of the polymer backbone.įurthermore, its upper temperature limit for continual use is rather lowĭue to the lack of crystallinity and its low glass transition temperature of It is attacked by hydrocarbon solvents, has poor oxygen and UV resistance,Īnd is rather brittle, i.e. However, polystyrene has several limitations. It is also easy to fabricate into a large number ofįinished goods since it is a viscous liquid above its glass Has excellent optical clarity due to the lack of crystallinity, and has good chemical resistance to diluted acids and bases. Plastic, comprising approximately seven percent of the total It is one of the largest volume commodity Thermoplastic that is easy to process and that can be easilyĬonverted into a large number of semi-finished products like foams,įilms, and sheets. Polystyrene (PS) is a clear, amorphous, nonpolar commodity (GPPS, HIPS, EPS, SBR, SBS, ABS) Properties
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