Acrylonitrile butadiene styrene and User talk:78.145.166.56: Difference between pages

Content deleted Content added

Inline

Revision as of 15:57, 10 October 2008

October 2008

Welcome to Wikipedia. The recent edit you made to Smiley has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. DavidWS (talk) 15:57, 10 October 2008 (UTC)

@@ Line 1: / Line 1: @@
-[[Image:ABS resin formula.PNG|right|frame|[[Monomers]] in ABS [[polymer]]]]
-[[Image:St marys no 5 pm 1 of 2.jpg|thumb|right|Black ABS plastic [[pipe]]s in use in a wet [[basement]] of a [[paper mill]], in [[Sault Ste. Marie, Ontario]].]]
-'''Acrylonitrile butadiene styrene,''' or '''ABS''', ([[chemical formula]] (C<sub>8</sub>H<sub>8</sub>· C<sub>4</sub>H<sub>6</sub>·C<sub>3</sub>H<sub>3</sub>N)<sub>n</sub>) is a common [[thermoplastic]] used to make light, rigid, molded products such as piping, musical instruments (most notably [[recorders]] and plastic [[clarinet]]s), golf club heads (used for its good [[shock absorbance]]), automotive body parts, wheel covers, enclosures, protective head gear, and toys, including [[Lego]] bricks<ref>[http://designinsite.dk/htmsider/m0007.htm ABS - acrylonitrile butadiene styrene] On Designsite.dk, lists applications. Retrieved 27 October 2006</ref>. In plumbing, ABS pipes are the black pipes ([[Polyvinyl chloride|PVC]] pipes are white) and also in [[Plastic Pressure Pipe Systems]]. ABS plastic ground down to an average diameter of less than 1 [[micrometre|micrometer]] is used as the colorant in some [[tattoo]] inks. [[Tattoo]] inks that use ABS are extremely vivid. This vividness is the most obvious indicator that the [[ink]] contains ABS, as [[tattoo]] inks rarely list their ingredients<ref>[http://www.bioedonline.org/news/news.cfm?art=1657 Biology News: Is tattoo ink safe?<!-- Bot generated title -->]</ref>.
+== October 2008 ==
-It is a [[copolymer]] made by polymerizing [[styrene]] and [[acrylonitrile]] in the presence of [[polybutadiene]]. The proportions can vary from 15 to 35% acrylonitrile, 5 to 30% [[butadiene]] and 40 to 60% styrene. The result is a long chain of polybutadiene criss-crossed with shorter chains of poly(styrene-co-acrylonitrile). The [[nitrile]] groups from neighboring chains, being polar, attract each other and bind the chains together, making ABS stronger than pure [[polystyrene]]. The styrene gives the plastic a shiny, impervious surface.  The butadiene, a [[rubber]]y substance, provides resilience even at low [[temperature]]s. ABS can be used between −25 and 60 °C. The properties are created by [[rubber toughening]], where fine particles of elastomer are distributed throughout the rigid matrix.
+[[Image:Information.png|25px]] Welcome to Wikipedia. The <span class="plainlinks">[http://en.wikipedia.org/wiki/Smiley?diff=244391481 recent edit]</span> you made to [[:Smiley]] has been reverted, as it appears to be unconstructive. Use the [[Wikipedia:Sandbox|sandbox]] for testing; if you believe the edit was constructive, ensure that you provide an informative [[Help:Edit summary|edit summary]]. You may also wish to read the [[Wikipedia:Introduction|introduction to editing]]. Thank you. <!-- Template:uw-huggle1 --> [[User:DavidWS|DavidWS]] ([[User talk:DavidWS|talk]]) 15:57, 10 October 2008 (UTC)
-Production of 1 kg of ABS requires the equivalent of about 2 kg of [[petroleum|oil]] for raw materials and energy. It can also be recycled<ref name=recycling>[http://www.anl.gov/techtransfer/Available_Technologies/Environmental_Research/Froth.html Plastics Recycling<!-- Bot generated title -->]</ref>.
-== Properties==
-ABS is derived from acrylonitrile, butadiene, and styrene.  Acrylonitrile is a synthetic monomer produced from [[propylene]] and [[ammonia]]; butadiene is a [[petroleum]] hydrocarbon obtained from [[butane]]; and styrene monomers, derived from coal, are commercially obtained from [[benzene]] and [[ethylene]] from coal.
-The advantage of ABS is that this material combines the strength and rigidity of the acrylonitrile and styrene polymers with the toughness of the polybutadiene rubber. The most important mechanical properties of ABS are resistance and toughness. A variety of modifications can be made to improve impact resistance, toughness, and heat resistance. The impact resistance can be amplified by increasing the proportions of polybutadiene in relation to styrene and also acrylonitrile although this causes changes in other properties. Impact resistance does not fall off rapidly at lower temperatures. Stability under load is excellent with limited loads.
-Even though ABS plastics are used largely for mechanical purposes, they also have good electrical properties that are fairly constant over a wide range of frequencies. These properties are little affected by temperature and atmospheric humidity in the acceptable operating range of temperatures.<ref name="Harper">Harper C.A., Handbook of plastic and elastomers, McGraw-Hill, New York, 1975, pp. 1-3,1-62, 2-42, 3-1</ref>
-The final properties will be influenced to some extent by the conditions under which the material is processed to the final product;  for example, molding at a high temperature improves the gloss and heat resistance of the product whereas the highest impact resistance and strength are obtained by molding at low temperature.
-ABS polymers are resistant to aqueous [[acids]], [[alkalis]], concentrated [[hydrochloric acid|hydrochloric]] and [[phosphoric acid|phosphoric]] acids, [[alcohols]] and animal, vegetable and mineral [[oils]], but they are swollen by [[glacial acetic acid]], [[carbon tetrachloride]] and [[Aromatic#Aromatic_compound_classifications|aromatic]] hydrocarbons and are attacked by concentrated [[sulfuric acid|sulfuric]] and [[nitric acid|nitric]] acids. They are soluble in [[esters]], [[ketones]] and [[ethylene dichloride]].
-The aging characteristics of the polymers are largely influenced by the polybutadiene content, and it is normal to include [[antioxidant]]s in the composition. On the other hand, while the cost of producing ABS is roughly twice the cost of producing [[polystyrene]], ABS is considered superior for its hardness, gloss, toughness, and electrical insulation properties. However, it will be degraded (dissolve) <ref>[http://www.vintagecomputing.com/index.php/archives/189 Vintage Computing and Gaming | Archive » Why Super Nintendos Lose Their Color: Plastic Discoloration in Classic Machines<!-- Bot generated title -->]</ref> when exposed to [[acetone]]. ABS is flammable when it is exposed to high temperatures, such as a wood fire. It will "boil", then burst spectacularly into intense, hot flames.
-==External links==
-* [http://www.parmaplast.no/gml/uk/technical/PPmatr.htm#ABS ABS material description]
-* [http://www.machinist-materials.com/comparison_table_for_plastics.htm Comparisons of many physical properties with other plastics]
-== References ==
-<references/>
-{{Plastics}}
-[[Category:Plastics]]
-[[Category:Copolymers]]
-[[Category:Thermoplastics]]
-[[ar:أكريلونيتريل بيوتادايين إستيرين]]
-[[bg:Акрилонитрил-бутадиен-стирен]]
-[[cs:Akrylonitrilbutadienstyren]]
-[[da:ABS-plast]]
-[[de:Acrylnitril-Butadien-Styrol]]
-[[es:Acrilonitrilo butadieno estireno]]
-[[fr:Acrylonitrile butadiène styrène]]
-[[id:Akrilonitril butadiena stiren]]
-[[it:Acrilonitrile butadiene stirene]]
-[[he:ABS (פלסטיק)]]
-[[nl:Acrylonitril butadieen styreen]]
-[[ja:ABS樹脂]]
-[[pl:ABS (tworzywo)]]
-[[pt:ABS (plástico)]]
-[[ru:АБС-пластик]]
-[[sk:Akrylonitrilbutadiénstyrén]]
-[[fi:ABS (muovi)]]
-[[sv:ABS-plast]]
-[[tr:Akrilonitril bütadien stiren]]
-[[uk:ABS-пластик]]
-[[zh:ABS树脂]]