| Revision as of 13:30, 5 December 2011 editBeetstra (talk | contribs)Edit filter managers, Administrators172,031 edits Saving copy of the {{chembox}} taken from revid 458366165 of page Poly(2,6-diphenylphenylene_oxide) for the Chem/Drugbox validation project (updated: 'CASNo'). |
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{{ambox | text = This page contains a copy of the infobox ({{tl|chembox}}) taken from revid of page ] with values updated to verified values.}} |
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{{chembox |
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| verifiedrevid = 458267925 |
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| verifiedrevid = 464209146 |
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| Name = Poly(2,6-diphenylphenylene oxide) |
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| Name = Poly(2,6-diphenylphenylene oxide) |
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| ImageFile = Poly(2,6-diphenylphenylene oxide).png |
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| ImageFile = Poly(2,6-diphenylphenylene oxide).png |
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| ImageSize = 120px |
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| ImageSize = 120px |
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| ImageName = Poly(2,6-diphenylphenylene oxide) |
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| ImageName = Poly(2,6-diphenylphenylene oxide) |
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| IUPACName = poly(2,6-diphenylphenylene oxide), poly(oxy -2,6-diphenyl-1,4-phenylene) |
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| IUPACName = poly(2,6-diphenylphenylene oxide), poly(oxy -2,6-diphenyl-1,4-phenylene) |
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| OtherNames = poly(oxy-2′,5′-diyl), poly(2,6-diphenylphenol), poly(2,6-diphenyl-p-phenylene oxide) |
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| OtherNames = poly(oxy-2′,5′-diyl), poly(2,6-diphenylphenol), poly(2,6-diphenyl-p-phenylene oxide) |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| CASNo_Ref = {{cascite|changed|??}} |
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| CASNo_Ref = {{cascite|changed|??}} |
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| CASNo = <!-- blanked - oldvalue: 24938-68-9 --> |
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| CASNo = 24938-68-9 |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} |
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| ChemSpiderID = NA |
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| ChemSpiderID = none |
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}} |
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| Section2 = {{Chembox Properties |
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|Section2={{Chembox Properties |
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| Formula = (C<sub>18</sub>H<sub>12</sub>O)<sub>x</sub> |
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| Formula = (C<sub>18</sub>H<sub>12</sub>O)<sub>x</sub> |
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| Density = 0.25 g/cm<sup>3</sup>, 0.55 g/ cm<sup>3</sup> (23% graphitised) |
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| Density = 0.25 g/cm<sup>3</sup>, 0.55 g/ cm<sup>3</sup> (23% graphitised) |
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| SpecificSurfaceArea = 35 m<sup>2</sup /g |
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| SpecificSurfaceArea = 35 m<sup>2</sup> /g |
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| PoreVolume = 2.4 cm<sup>3</sup>/g |
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| PoreVolume = 2.4 cm<sup>3</sup>/g |
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| Average Pore Size = 200 nm}} |
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| AveragePoreSize = 200 nm}} |
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'''Poly(2,6-diphenyl-p-phenylene oxide)''' (PPPO) is a porous ] ] based on ] of ]. It is mostly known by its trademark Tenax. Texas Highway patrol has had a recent rise in icllit drug seizures.{{Citation needed|date=September 2024}} |
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== Properties == |
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Poly(2,6-diphenylphenylene oxide) is a low bleeding material with a low level of impurities, and has a high thermal stability (up to 350 °C). Before use poly(2,6-diphenylphenylene oxide) should be thermally conditioned with a high purity gas at elevated temperatures to remove any residual components. During conditioning or thermal desorption the presence of oxygen should be avoided. Poly(2,6-diphenylphenylene oxide) reacts with oxidising agents such as ], ], ] and ]s forming ], ] and ]. Therefore, control of blanks is essential and storage time of samples on poly(2,6-diphenylphenylene oxide) is less than a month. Pre-filters based on ] or ] may be appropriate to use. The breakthrough volumes are low for very volatile substances. This problem is partly solved by graphitised poly(2,6-diphenylphenylene oxide). Although the polymer has a low affinity for water, high humidity in air may lower the breakthrough volumes of substances. |
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== Use == |
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Poly(2,6-diphenylphenylene oxide) is used for trapping of volatiles and semi-volatiles from air such as environmental air and human breath, and for ]. It is also used for determining the emission of chemical substances from plants, soil and commercial products. Volatile substances in liquid or solid matrices can be made available by the ] technique. The polymer is of particularly used for concentration of high boiling compounds such as ], ]s, ]s, ]s, ]s and ]s, ]s, ]s, ]s, ]s and ]. |
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Poly(2,6-diphenylphenylene oxide) is used as food simulant for testing the release of chemical substances from ] into ].<ref> of European COUNCIL DIRECTIVE of 18 October 1982 laying down the basic rules necessary for testing migration of the constituents of plastic materials and articles intended to come into contact with foodstuffs (82/711/EEC) Office for Official Publications of the European Communities 01/09/1997</ref> |
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== Trademarks == |
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Tenax is a registered trademark of Buchem B.V. |
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* Tenax GC (replaced by Tenax TA) |
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* Tenax TA (mesh 20-35, 35-60, 60-80, 80-100, 100-200) |
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* Tenax GR: 23% graphite (mesh 20-35, 35-60, 60-80, 80-100) |
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== References == |
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{{reflist}} |
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== External links == |
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* |
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* |
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*Henry J. McDermott, Shirley A. Ness (2004) , 2nd Ed, John Wiley and Sons, 172-173, {{ISBN|0-471-45435-4}}, {{ISBN|978-0-471-45435-9}} |
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*Șerban Moldoveanu, Víctor David (2002) , Journal of Chromatography Library 65, Elsevier, 277-278, {{ISBN|0-444-50394-3}}, {{ISBN|978-0-444-50394-7}} |
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] |