Acrylonitrile-butadiene-styrene copolymer ABS

Acrylonitrile-butadiene-styrene (ABS) copolymer Poly(vinylidene chloride)... 

The homopolymers, which are formed from alkyl cyanoacrylate monomers, are inherently brittle. For applications which require a toughened adhesive, rubbers or elastomers can be added to improve toughness, without a substantial loss of adhesion. The rubbers and elastomers which have been used for toughening, include ethylene/acrylate copolymers, acrylonitrile/butadiene/styrene (ABS) copolymers, and methacrylate/butadiene/styrene (MBS) copolymers. In general, the toughening agents are incorporated into the adhesive at 5-20 wt.% of the monomer. 

Furthermore, Hirschler (32) has investigated the smoke-reducing ability of a number of metal hydroxides and oxides, at incorporation levels of up to 40 phr in acrylonitrile-butadiene-styrene (ABS) copolymer. At the lowest additive level studied (10 phr), SnO gave a higher degree of smoke suppressancy (viz. 58%), than any of the other compounds, and loadings of at least 30 phr were found to be necessary to achieve comparable performance with either A1(0H) or Mg(0H). 3... 

J. Abenojar, R. Torregrosa-Coque, M.A. Martinez, and J.M. Martin-Martinez, Surface modifications of polycarbonate (PC) and acrylonitrile butadiene styrene (ABS) copolymer by treatment with atmospheric plasma, Surf. Coat. Technol, 203(16) 2173-2180, May 2009. 

M. Brebu, T. Bhaskar, K. Murai, A. Muto, Y. Sakata, and M.A. Uddin, The individual and cumulative effect of brominated flame retardant and polyvinylchloride (pvc) on thermal degradation of acrylonitrile-butadiene-styrene (ABS) copolymer, Chemosphere, 56(5) 433 440, August 2004. 

Acrylonitrile-Butadiene-Styrene (ABS) Copolymers. This basic three-monomer system can be tailored to yield resins with a variety of properties. Acrylonitrile contributes heat resistance, high strength, and chemical resistance. Butadiene contributes impact strength, toughness, and retention of low-temperature properties. Styrene contributes gloss, processibility, and rigidity. ABS polymers are composed of discrete polybutadiene particles grafted with the styrene-acrylonitrile copolymer these are dispersed in the continuous matrix of the copolymer. 

PS = Polystyrene including expanded polystyrene (EPS) and acrylonitrile-butadiene-styrene (ABS) copolymers... 

In works [46-48] by method of EPR-tomography thermo- and photo-oxidation of poly(acrylonitrile-butadiene)styrene (ABS) copolymer were studied. This polymer is structurally and dynamically micro-heterogeneous, i.e. there are regions with high content of polybutadiene and regions with high content of polystyrene or polyacrylonitrile. In polymer... 

Figure 9. Distribution of nitroxyl radicals concentration by thickness of sample underwent thermo-oxidative destruction at 120°C a - poly(acrylonitril-butadiene-styrene (ABS) copolymer), thickness of sample is 3,8mm b - polypropylene copolymer with polyethylene, thickness of sample is 3,4mm. The inset is the example of EPR-spectrum of nitroxyl radical in ABS-copolymer.

THE STRAIN RATE DEPENDENCE OF DEFORMATION AND FRACTURE BEHAVIOUR OF ACRYLONITRILE-BUTADIENE-STYRENE (ABS) COPOLYMER... 

Isothermal in oxygen atmosphere. Heating under nitrogen from room temperature up to a chosen temperature followed by replacement of nitrogen by oxygen and start of the isothermal experiment. Polypropylenes (PP) and acrylonitrile-butadiene-styrene (ABS) copolymers have been evaluated under these conditions. Isothermal experiments have been carried out also with nylon samples. 

In both Europe and the United States, aluminum trihydrate, or ATH [Al(OH)3)], has by far the largest share of the mineral flame-retardant market however, magnesium hydroxide presently has the highest growth rate. To date, most of the research using magnesium hydroxide has focused on thermoplastics, including ethylene-vinyl acetate copolymer (EVA), polypropylene, acrylonitrile-butadiene-styrene (ABS) copolymer, and modified polyphenylene oxide (Hornsby and Watson, 1986). 

When a mixture of styrene and acrylonitrile is polymerized in the presence of a polybutadiene latex by an emulsion radical process, an acrylonitrile-butadiene-styrene (ABS) copolymer is obtained. This ABS copolymer is actually a mixture of (a) a graft copolymer which contains some of the styrene/acrylonitrile (ST/AN) copolymer chemically bound to the polybutadiene backbone, and (b) a random copolymer, conventionally designated as a linear copolymer, which is not bound to the polybutadiene backbone but which consists of the portion of the styrene/acrylonitrile monomer that has polymerized separately. 

Acrylonitrile-butadiene-styrene (ABS) copolymers are produced by three monomers acrylonitrile, butadiene, and styrene. The desired physical and chemical properties of ABS polymers with a wide range of functional characteristics can be controlled by changing the ratio of these monomers. They are resistant... 

Styrene is also used as a basis of copolymers with other monomers. Styrene-acrylonitrile copolymer (SAN) has properties rather similar to PS but is somewhat tougher. Acrylonitrile-butadiene-styrene (ABS) copolymers, on the other hand resemble HIPS and are manufactured by a similar graft-copolymerisation process. This material has proved to be very useful for computer housing but like HIPS it is not very environmentally stable and discolours readily. 

This polymer can be prepared by the interfacial polycondensation of bisphenol A alkali salt dissolved in the water phase and phosgene (COQj) dissolved in methylene chloride. It can be used either as the pure polymer or in blends, particularly with acrylonitrile-butadiene-styrene (ABS) copolymers. The bisphenol A structure appears in other combinations, e.g., in a polysulfone copolymer (see Table 15.10) and in aromatic polyesters with phthalic acid moieties... 

In experiments on immiscible blends, as noted by Dlubek et al. [2002], it is to be anticipated that the PALS parameters h and T3 will depend on the volume fractions and compositions of the three phases, as well as the effect of any interaction between the blend components. Such interactions have been identified in the studies of Wastlund et al. [1998] and Dlubek et al. [1999]. Thus, as pointed out above, the decrease in T3 observed by Wastlund et al. [1998] in 50 50 SMA24/SANx blends when the acrylonitrile content of the SANx increases from x=22% to x=33%, is interpreted as being due to increased interaction between the maleic anhydride and acrylonitrile groups. On the other hand, Dlubek et al. [1999] studied blends of an acrylonitrile-butadiene-styrene (ABS) copolymer and polyamide-6 (PA-6). This blend may be assumed to be quite heterogeneous, consisting of a two-phase structure having PA-6 crystals embedded in an amorphous ABS matrix and elastomeric... 

Fig. 7.1 Photodegradation of an acrylonitrile/butadiene/ styrene (ABS) copolymer at 30 °C. Plot of the impact strength I s. the simulated natural exposure time (xenon-arc radiation, 0.55 W m at 340 nm). Adapted from Davis et al. [45] with permission from Elsevier.

Indirect fluid beds have already proved efficient in drying very heat-sensitive polymers with large constant-rate drying periods, as in drying PVC, polyethylene, acrylonitrile-butadiene-styrene (ABS) copolymers, and polycarbonates (PC). 

Multi-block copolymers can form a greater variety of ordered phase structures than diblock copolymers, via self-assembly. Some of them have been widely applied as the matrix materials, such as styrene-butadiene-styrene (SBS) thermal elastomers, acrylonitrile-butadiene-styrene (ABS) copolymers and polyurethanes. 

Copolymers of acrylonitrile and lower acrylates have also been used as thickeners. The proportion of the acrylate in the copolymer was 60-90% by weight the preferred acrylates were the methyl through butyl esters. These authors also tested an extensive list of known and novel thickeners as comparative examples. The latter included nitrile rubber and vinyl acetate-vinyl chloride, methyl methacrylate-butadiene-styrene (MBS), and acrylonitrile-butadiene-styrene (ABS) copolymers. The copolymers of this invention were claimed to provide better stability, higher viscosity, less stringing, and better impact strength than do the thickeners of the prior art. The claims of this patent do not cover the disclosed copolymers. Polyvinyl ethers are another class of cyanoacrylate thickeners which have been disclosed but not claimed. ... 

Oligomeric aromatic phosphates have been patented and commercially used as flame-retardant additives mainly for impact-resistant polystyrene blends with polyphenylene oxide and polycarbonate blends with acrylonitrile-butadiene-styrene (ABS) copolymers (130,131). They have also been shown useful in thermoplastic polyesters (92). The principal commercial examples are based on phenol and resorcinol (Akzo-Nobel s Fyrolflex RDP) or phenol and bisphenol A (Akzo-Nobel s Fyrolflex BDP or Albemarle s Ncendx P-30). Although these have the diphosphate as their principal ingredient, they also contain higher oligomers. 

For rubber-modified, high-impact PS (HIPS), polybutadiene (PB) is dissolved in the styrene monomer (5-10%) and grafting onto the PB takes place. The copolymer styrene/acrylonitrile (SAN) is made in a diluent with controlled addition of S and AN using a free-radical initiator. Copolymers with high AN (70-80%) have low gas permeability and are used for containers. Acrylonitrile/butadiene/styrene (ABS) copolymers are often made in water using a polybutadiene latex together with AN and S monomers and a water-soluble initiator (e.g. persulphate). The random copolymer rubber 75% styrene/25% butadiene (SBR) is also made as an aqueous emulsion using a persulphate initiator. 

Lucky Co., Ltd. manufactures polybutyleneterephthalate (PBT) and acrylonitrile-butadiene-styrene (ABS) copolymers. The production volume of PBT is 5 kt/year and that of ABS is 250 kt/year. 

One of the factors which has been shown to influence the occurrence of stick-slip motion is the roughness of the surftices in contact. Eiss and McCann (6) found that acrylonitrile-butadiene-styrene (ABS) copolymer surftices with a Ra roughness of 0.85... 

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