Nitrile rubber to form ABS

Motionless Mixer Blending of Styrene/ Acrylonitrile Copolymer and Nitrile Rubber to Form ABS... 

Polyacrylonitrile (PAN) is formed by the peroxide-initiated free-radical polymerization of acrylonitrile (CH2=CH—CN). The major application of PAN is as the fiber Orion. When copolymerized with butadiene, it forms Buna N or nitrile rubber, which is resistant to hydrocarbons and oils. As a copolymer with styrene (SAN), it is a transparent plastic with very good impact strength used for machine components and for molding crockery. As a terpolymer of acrylonitrile-butadiene-styrene (ABS), the plastic is known for its toughness and good strength and finds applications in water lines and drains. 

Synthetic rubbers are made from chloroprene and butadiene which form neoprene and buna, respectively. The copolymer of acrylonitrile with butadiene (1,3) is known as nitrile rubber and styrene with butadiene (1,3) is Buna S. The combination of acrylonitrile, butadiene, and styrene in various formulations is used to form the thermoplastic ABS. 

Transition from liquid behavior to solid behavior has been reported with fine particle suspensions with increased filler content in both Newtonian and non-Newtonian liquids. Industrially important classes are rubber-modified polymer melts (small rubber particles embedded in a polymer melt), e.g. ABS (acrylo-nitrile-butadiene-styrene) or HIPS (high-impact polystyrene) and fiber-reinforced polymers. Another interesting suspension is present in plasticized polyvinylchloride (PVC) at low temperatures, when suspended PVC particles are formed in the melt [96], The transition becomes evident in the following... 

Owing to the uncertain situation, several companies have withdrawn from this field and at the present time only one type of nitrile resin is commercially available. This product is a copolymer of acrylonitrile and methyl acrylate (70 30 parts by weight) which is formed in the presence of a butadiene-acrylonitrile rubber 00-15%). The product thus contains graft copolymer and has a structure resembling that of ABS polymers previously described (section 3.4.1(b)). 

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