Styrene-rubber plastic

Styrene-rubber plastics Plastics that are composed of a minimum of... 

Styrene-rubber plastic See high-impact polystyrene. 

Styrene-Rubber Plastic See High-Impact Polystyrene. 

Styrene maleic anhydride SMA is a copolymer made with or without rubber modifiers. They are sometimes alloyed with ABS and offer good heat resistance, high impact strength and gloss but with little appreciable improvement in weatherability or chemical resistance over other styrene based plastics. 

S. Bandyopadhyay, S.L. Agrawal, P. Sajith, N. Mandal, S. Dasgupta, R. Mukhopadhyay, A.S. Deuri, and S.C. Ameta, Research on the application of recycled waste RFL (Resorcinol-Formaldehyde-Latex) dip solid in Styrene Butadiene Rubber based compounds. Progress in Rubber, Plastics and Recycling Technology, 23(1), 21, 2007. 

Berlin and coworkers (5,56) desired to obtain a material with an increased mechanical strength. They carried out a plasticization of bulk ami emulsion polystyrene molecular weight 80000 and 200000 respectively at 150-160° C, with polyisobutylene, butyl rubber, polychloroprene, polybutadiene, styrene rubber (SKS-30) and nitrile rubber (SKN 18 and SKN 40). The best results were obtained with the blends polystyrene-styrene rubber and polystyrene-nitrile rubber. An increase of rubber content above 20-25% was not useful, as the strength properties were lowered. An increase in the content of the polar comonomer, acrylonitrile, prevents the reaction with polystyrene and decreases the probability of macroradical combination. This feature lowers the strength, see Fig. 14. It was also observed that certain dyes acts as macroradical acceptors, due to the mobile atoms of hydrogen of halogens in the dye, AX ... 

Marchsan and Morran (2002) found that flavor descriptions varied between chlorinated and nonchlorinated water in contact with PE and PP with stronger tastes frequently found in chlorinated samples. "Plas-tic/rubber" terms were used for chlorinated and nonchlorinated waters stored in PP and PE as well as in nonchlorinated waters from acryloni-trile/butadience/styrene (ABS). "Plastic/chemical" descriptors were used for chlorinated and nonchlorinated waters in PP and PE and polyurea materials, and in ABS materials for chlorinated waters only. Polyurethane materials contributed chemical tastes to chlorinated waters and medicinal flavors to nonchlorinated water. The "chemical" term also was applied to chlorinated water stored in PP, PE, and ABS and nonchlorinated water stored in ABS. "Medicinal" also was used to describe both nonchlorinated and chlorinated waters stored in PP. 

Separation of benzene/cyclohexane mixture is investigated most extensively. This is not surprising because separation of this mixture is very important in practical terms. Benzene is used to produce a broad range of valuable chemical products styrene (polystyrene plastics and synthetic rubber), phenol (phenolic resins), cyclohexane (nylon), aniline, maleic anhydride (polyester resins), alkylbenzenes and chlorobenzenes, drugs, dyes, plastics, and as a solvent. Cyclohexane is used as a solvent in the plastics industry and in the conversion of the intermediate cyclohexanone, a feedstock for nylon precursors such as adipic acid. E-caprolactam, and hexamethylenediamine. Cyclohexane is produced mainly by catalytic hydrogenation of benzene. The unreacted benzene is present in the reactor s effluent stream and must be removed for pure cyclohexane recovery. 

Ethanox 376 is a stabilizer that provides heat stability by preventing thermo-oxidative degradation during processing and service life. It provides compatibility with resins and extraction resistance. It can be applied in polyolefins, such as polyethylene, polypropylene, polybutene-1 and other polymers such as engineering plastics, styrenes, polyurethanes, saturated and unsaturated elastomers, styrenics, rubber modified styrenics, segmented block copolymers, and PVC. 

MAJOR USES Used in the manufacture of styrene-butadiene rubbers, plastics, acrylics, latex paints and resins organic intermediate in adiponitrile production. 

A butadiene-styrene rubber with polyacrylonitrile (best plasticized). 

Uses Solvent and raw material for prod, of cellulose acetate, acetophenone, diethyl benzene, anthraquinones chem. intermediate in mfg. of styrene, other plastics, syn. rubber, styrene latexes minor component of gasoline and aviation fuels reagent cosmetics ingred. 

Uses Pigment in paints, printing inks, emulsion paints, wallpaper, linoleum, carbon papers, student-grade artist materials, syn. resin lacquers, leather finishes, inks for foil and tinplate printing, paper coating and dyeing, typewriter ribbons, rubber, celluloid, cellulose acetate, P/F, U/F, styrene, protein plastics, and textile printing... 

In some polymer families, copolymerization with more flexible comonomer units is very effective in producing the amount of flexibility desired. Major commercial examples are ethylene/propylene rubber, styrene/butadiene plastics and latex paint, vinyl chloride/ vinyl acetate plastics, vinyl acetate/acrylic ester latex paints, and methyl methacrylate/ acrylic ester plastics and latex paints. 

The three major types of TPEs are block copolymers such as SEES (styrene-ethylene-butylene-styrene block copolymer) (Kraton by Kraton Polymer), polyether— polyester (Hytrel by DuPont), rubber/plasticblends (900 series Sumitomo Chemical), and dynamically vulcanized rubber/plastic alloys (Innoprene by Kumho Polychem, Santo prene by Exxon-Mobil, Sarlink by DSM, Unipene byTeknor Apex). Figure 3.28 shows the cost versus general performance comparison for different TPEs [31]. 

The existence of the vinyl group enables styrene to polymerize and produce commercially significant products used in rubber, plastic, insulation, fiberglass, pipes, automobile and boat parts, and food containers. In 2010, the global production of styrene was almost 25 miUion metric tons (U.S. Department of Energy, 2012). A simple schematic of ethylbenzene dehydrogenation is illustrated in Figure 21.4. 

Acrylonitrile (H2C=CH-CN) is used as a co-polymer in approximately 25% of all synthetic fibers. It is further used for synthetic rubbers and for the production of acrylonitrile-butadiene-styrene plastics and styrene-acrylonitrile plastics. These ter- and co-polymers are used in the automobile industry and in the production of house wares, electrical appliances, suitcases, food packaging and disposable dishes. Acrylonitrile can also be a constituent in fabrics and paints (Bjorkner 1995). 

These structures are illustrated in Figure 1.3. Through the leadership of Amos and others, polymer blends and grafts found uses as rubber-toughened plastics, which include high-impact polystyrene (HiPS) and acrylonitrile-butadiene-styrene (ABS) plastics. As further illustrated in Table 1.1, block copolymers containing a water-soluble block and an oil soluble block became important as surfactants through the work of Lunsted, while other block copolymers, composed of elastomer and plastic blocks, were useful as thermoplastic elastomers. 

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