Acrylonitrile-butadiene-styrene grades available

Copolymers show chemical resistance generally similar to that of polystyrene and terpolvmers similar to that of ABS (acrylonitrile-butadiene-styrene). Neither type is recommended for use in strongly alkaline environments. All impact versions have good natural color and products are available in a wide range of colors. Copolymer crystal grades have good clarity and gloss. 

The most important commercial blends of BPA-PC are poly(acrylonitrile-butadiene-styrene) (PC/ABS) and polybutylene terephthalate (PC/PBT) or polyethylene terephthalate (PET). Commercial grades of PC/ABS include CYCOLOY (GE), Bayblend (Bayer), and PULSE (Dow). PC/ABS blends exhibit improved flow and processability and enhanced low-temperature impact strength in comparison to PC (Fig. 3). These blends are widely used in applications requiring enhanced impact resistance, such as interior automotive parts and computer and electronics applications such as computer housings and cell phones. Non-halogenated flame-retardant PC/ABS blends are widely available. Poly(acrylic-styrene-acrylonitrile) (PC/ ASA) blends (GELOY , GE Luran , BASF) provide improved weatherability for outdoor applications such as exterior automotive parts, but exhibit reduced impact performance at low temperatures in comparison to PC/ABS. PC/PBT or PET blends (XENOY , GE Makroblend , Bayer) provide enhanced chemical resistance and weatherability for applications such as lawn and garden equipment and automotive bumpers and fasdas. 

Acrylonitrile-butadiene-styrene, a modified polystyrene, is the material most widely used for the injection moulding of telephone housings. It exhibits good mouldability with good surface finish and impact strength, and is available in flame retardant grades. It has been used for other applications such as connectors, but its poor solvent and temperature resistances have led to its displacement from applications demanding these properties. 

Acrylonitrile-Butadiene-Styrene (ABS) is a thermoplastic material made with virgin ABS compounds. Pipe is available in both solid waU and cellular core wall, which can be used interchangeably. Pipe and fittings are available in VA inch through 12 inch. The pipe can be installed above or below grade. 

ABS. A thermoplastic, a terpolymer of acrylonitrile, butadiene, and styrene. ABS products are characterized by toughness and rigidity as well as by a higher thermal stability and scratch resistance than those of many other thermoplastics. Glass fibre reinforced, fiame-retardant, and other modified ABS grades are also available. ABS components can be metallized, for example, chromium-plated. Some applications panels and other car accessories casing and various parts of business machines, appliances, radio, TV sets, tape recorders pipes. Trade names Cycolac (USA), Kralastic (USA), Novodur (FRG), Techster (F), Terluran (FRG). 

Natural polystyrene has a strong tendency to crack, and can only be used in most potential applications when modified to form high-impact or toughened polystyrene grades or ABS. It can be toughened by polybutadiene, butadiene-acrylonitrile copolymer rubber, or SBS or SEBS block copolymers. The rubber can be added before or after polymerisation of the styrene monomer. In the case of polybutadiene, two reactions take place styrene polymerisation, and graft copolymerisation of the styrene with the polybutadiene. A brief outline of this operation is available on the Dynasol website (www.dynasolesastomers.com). 

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