Knowledge (XXG)

Polyphenyl ether

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other optical polymers, that is, they have refractive indices of between 1.5 and 1.7 and provide good propagation of light between approximately 400 nm and 1700 nm. Close refractive index (RI) matching between materials is important for proper propagation of light through them. Because of the ease of RI matching, PPEs are used in many optical devices as optical fluids. Extreme resistance to ionizing radiation gives PPEs an added advantage in the manufacture of solar cells and solid-state UV/blue emitters and telecommunication equipment made from high-index glasses and semiconductors.
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avoided, such as in certain electronic devices. A thin film of polyphenyl ether on a surface is not a thin contiguous film as one would envision, but rather comprises tiny droplets. This PPE property tends to keep the film stationary, or at least to cause it to remain in the area where the lubrication is needed, rather than migrating away by spreading and forming a new surface. As a result, contamination of other components and equipment, which do not require a lubricant, is avoided. The high surface tension of PPEs, therefore, makes them useful in lubricating electronic contacts.
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Due to the low volatility and excellent high-temperature thermo-oxidative stability, PPEs have also found use as a lubricant for chains used in and around kilns, metal fabrication plants, and glass molding and manufacturing equipment. In these high-temperature applications, PPEs do not form any sludge and hard deposits. The low soft-carbon residue that is left behind is removed easily by wiping. PPEs' low volatility, low flammability, and good thermodynamic properties make them ideally suited for use as heat transfer fluids and in heat sink applications as well.
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also used as base fluids for radiation-resistant greases used in nuclear power plant mechanisms. PPEs and their derivatives have also found use as vapor phase lubricants in gas turbines and custom bearings, and wherever extreme environmental conditions exist. Vapor phase lubrication is achieved by heating the liquid lubricant above its boiling point. The resultant vapors are then transported to the hot bearing surface. If the temperatures of the bearing surface are kept below the lubricant’s boiling point, the vapors re-condense to provide liquid lubrication.
109: 82: 1081: 28: 224:. PPEs have the disadvantage of having somewhat high pour points. For example, PPEs that contain two and three benzene rings are actually solids at room temperatures. The melting points of the ordinarily solid PPEs are lowered if they contain more m-phenylene rings, alkyl groups, or are mixtures of isomers. PPEs that contain only o- and p-substituted rings have the highest melting points. 145:(DPE), also called diphenyl oxide, the structure of which is provided in Figure 4. Low molecular weight polyphenyl ethers and thioethers are used in a variety of applications, and include high-vacuum devices, optics, electronics, and in high-temperature and radiation-resistant fluids and greases. Figure 5 shows the structure of the sulfur analogue of 3-R polyphenyl ether shown in Figure 3. 98: 20: 1087: 746:. See Figure 2 for the PPO structure. PPO polymers can be classified as plastic resins. They and their composites with polystyrene, glass, and nylon are used as high-strength, moisture-resistant engineering plastics in a number of industries, including computer, telecommunication, and automotive parts. PPOs are marketed by 706:
Polyphenyl ethers (PPEs) possess good optical clarity, a high refractive index, and other beneficial optical properties. Because of these, PPEs have the ability to meet the rigorous performance demands of signal processing in advanced photonics systems. Optical clarity of PPEs resembles that of the
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10 ergs/gram of radiation at 99 °C (210 °F) was compared with synthetic ester, synthetic hydrocarbon, and silicone fluids. PPE showed a viscosity increase of only 35%, while all other fluids showed a viscosity increase of 1700% and gelled. Further tests have shown PPEs to be resistant
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PPEs were developed for use in jet engines that involved high speed-related frictional temperatures of as high as 320 °C (608 °F). While the use of PPEs in lubricating jet engines has somewhat subsided due to their higher cost, they are still used in some aerospace applications. PPEs are
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Bolt, R. O., "Radiation Effects on Lubricants," CRC Handbook of Lubrication, Vol. I, Theory and Practice of Tribology: Applications and Maintenance, pp. 3–44 , Richard E. Booser Editor, CRC Press, Boca Raton, 1983. Carroll, J. G. and Bolt. R. O., Radiation Effects on Organic Materials, Bolt. R. O.
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PPEs have excellent high temperature properties and good oxidation stability. With respect to volatilities, p-derivatives have the lowest volatilities, and the o-derivatives have the highest volatilities. The opposite is true for flash points and fire points. Spontaneous ignition temperatures of
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Polyphenyl ether technology can also provide superior fire safety and fatigue life, depending on the specific bearing design. In this application, PPEs have the advantage of providing lubrication both as a liquid at low temperatures and as a vapor at temperatures above 315 °C (599 °F).
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polyphenyl ethers lie between 550 and 595 °C (1,022 and 1,103 °F), alkyl substitution reduces this value by ~50 °C (122 °F). PPEs are compatible with most metals and elastomers that are commonly used in high-temperature applications. They typically swell common seal materials.
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Polyphenyl ether lubricants have a 30-year history of commercial service for connectors with precious and base metal contacts in telecom, automotive, aerospace, instrumentation and general-purpose applications. In addition to maintaining the current flow and providing long-term lubrication, PPEs
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5R4E PPE has a surface tension of 49.9 dynes/cm, which is amongst the highest in pure organic liquids. Because of this, this PPE and the other PPEs do not effectively wet metal surfaces. This property is useful when migration of a lubricant from one part of the equipment to another part must be
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equal to 1 is identified as pmp5P4E, indicating para, meta, para substitution of the three middle rings, a total of 5 rings, and 4 ether linkages. Meta substitution of the aryl rings in these materials is most common and often desired. Longer chain analogues with up to 10 benzene rings are also
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s). The phenoxy groups in the former class of polymers do not contain any substituents whereas those in the latter class contain 2 to 4 alkyl groups on the phenyl ring. The structure of an oxygen-containing PPE is provided in Figure 1 and that of a 2, 6-xylenol derived PPO is shown in Figure 2.
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10 torr at 25 °C. Such high vacuums are necessary in equipment such as electron microscopes, mass spectrometers and that used for various surface physics studies. Vacuum pumps are also used in the production of electric lamps, vacuum tubes, and cathode ray tubes (CRTs), semiconductor
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PPEs have high surface tension; hence these fluids have a lower tendency to wet metal surfaces. The surface tension of the commercially available 5R4E is 49.9 dynes/cm, one of the highest in pure organic liquids. This property is useful in applications where migration of the lubricant into the
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Ionizing radiation affects all organic compounds, causing a change in their properties because radiation disrupts covalent bonds that are most prevalent in organic compounds. One result of ionization is that the organic molecules disproportionate to form smaller hydrocarbon molecules as well as
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Typical physical properties of polyphenyl ethers are provided in Table 2. Physical properties of a particular PPE depend upon the number of aromatic rings, their substitution pattern, and whether it is an ether or a thioether. In the case of products of mixed structures, properties are hard to
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PPEs, being of excellent thermo-oxidative stability and radiation resistance, have found extensive use in high temperature applications that also require radiation resistance. In addition, PPEs demonstrate better wear control and load-carrying ability than mineral oils, especially when used in
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in combination with a fore pump are amongst the most popular. Diffusion pumps use a high boiling liquid of low vapor pressure to create a high-speed jet that strikes the gaseous molecules in the system to be evacuated and direct them into space that is being evacuated by the fore pump. A good
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PPEs of up to 6 phenyl rings, both oxy and thio ethers, are commercially available. See Table 1. They are characterized by indicating the substitution pattern of each ring, followed by the number of phenyl rings and the number of ether linkages. Thus, the structure in Figure 1 with
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While originally PPEs were developed for use in extreme environments that were experienced in aerospace applications, they are now used in other applications requiring low volatility and excellent thermo-oxidative and ionizing radiation stability. Such applications include use as
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diffusion fluid must therefore reflect low vapor pressure, high flash point, high thermal and oxidative stability and chemical resistance. If the diffusion pump is operating in the proximity of ionizing radiation source, good radiation stability is also desired.
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offer protection to connectors against aggressive acidic and oxidative environments. By providing a protective surface film, polyphenyl ethers not only protect connectors against corrosion but also against vibration-related wear and abrasion that leads to
415:) the polyphenyl ethers are the most radiation resistant. Excellent radiation stability of PPEs can be ascribed to the limited number of ionizable carbon-carbon and carbon-hydrogen bonds. In one study, the performance of PPE under the influence of 1 446:
fluids; high vacuum fluids; and in formulating jet engine lubricants, high-temperature hydraulic lubricants and greases, and heat transfer fluids. In addition, because of excellent optical properties these fluids have found use in optical devices.
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wear. The devices that benefit from the specialized properties of PPEs include cell phones, printers, and a variety of other electronic appliances. The protection lasts for decades or for the life of the equipment.
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larger hydrocarbons molecules. This is reflected by increased evaporation loss, lowering of the flash and fire points, and increased viscosity. Other chemical reactions caused by radiation include oxidation and
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The proper name for a phenyl ether polymer is poly(phenyl ether) or polyphenyl polyether, but the name polyphenyl ether is widely accepted. Polyphenyl ethers (PPEs) are obtained by repeated application of the
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Hamid, S. and Burian, S. A., "Polyphenyl Ether Lubricants," published in Synthetics, Mineral Oils, and Bio-based Lubricants: Chemistry and Technology, Leslie R. Rudnick Editor, pp. 175–199, Taylor and Francis
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Using Lubricants to Avoid Failures in Medical Electronic Connectors," by Sibtain Hamid in Medical Electronics Manufacturing, Spring 2004 and SANTOLUBES Brochure on Stationary lubricants prevent connector
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2002grc087 High Heat PPO.: 13C and 31P NMR Methods for Characterizing End Groups and Chain Structures in Poly(2,6-dimethyl-1,4-phenylene oxide)/Poly(2,3,6-trimethyl-1,4-phenylene oxide) Copolymers
792:"Synthetic Lubricants," Chapter 6, pp. 96–153, Lubricants and Related Products: Synthesis, Properties, Applications, International Standards by Dieter Klamann, Verlag Chemie Gmbh publisher (1984) 783:
Joaquim, M., "Polyphenyl Ether Lubricants" Synthetic Lubricants and High-performance Functional Fluids", R. L. Rudnick and R. L. Shubkin, Eds., p. 239, Marcel Dekker, Inc., NY, 1999
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Oxidation stability of un-substituted PPEs is quite good, partly because they lack easily oxidizable carbon-hydrogen bonds. Thermal decomposition temperature, as measured by the
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Data presented in Table 3 demonstrates polyphenyl ether to be superior to other fluids that are commonly used in diffusion pumps. PPEs help achieve the highest vacuum of 4
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These polymers are made through oxidative coupling of substituted phenol in the presence of oxygen and copper and amine containing catalysts, such as
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PPEs have extremely high radiation resistance. Of all classes of synthetic lubricants (with the possible exception of
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Joaquim, M. E. and J. F. Herber, "Lubrication of Electronic Connectors and Equipment in Radiation Environments,
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The important attributes of PPEs include their thermal and oxidative stability and stability in the presence of
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The Surface Tension of Pure Liquid Compounds, Joseph J. Jasper, J. Phys. Chem. Ref. Data, Vol. 1, No. 4, 1972;
765:"The Ullmann Ether Condensation," by A A Moroz and Mark S Shvartsberg, 1974, Russ. Chem. Rev. 43 (8), 679-689 1164: 1055: 1040: 1020: 733: 64: 1579: 1457: 1212: 940: 898: 1759: 1463: 1108: 876: 1479: 1474: 1447: 1365: 812: 118: 86: 1799: 1794: 1609: 1370: 1293: 1207: 1159: 108: 1624: 1542: 1283: 1257: 1227: 1187: 1169: 1118: 1070: 1050: 412: 221: 1789: 1754: 1720: 1640: 1452: 1274: 1192: 891: 217:
predict from only the structural features; hence, they must be determined via measurement.
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Either class can have the oxygen atoms attached at various positions around the rings.
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are devices that remove gases from an enclosed space to greatly reduce pressure. Oil
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linkages. Commercial phenyl ether polymers belong to two chemical classes:
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SANTOLUBES Brochure on Stationary lubricants prevent connector failures
835:"Inside a Vacuum Diffusion Pump," by Manuel E. Joaquim and Bill Foley; 122: 39: 43: 813:
http://www.chemassociates.com/products/findett/PPEs_Radiation2.pdf
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procedure, is between 440 and 465 °C (824 and 869 °F).
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10 erg/g at temperatures up to 315 °C (599 °F).
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Figure 2: Representative Structure of Polyphenylene Oxide (PPO)
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Three- and four-ring oxy- and thioethers; trade name: MCS-293
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Figure 1: Representative Structure of Polyphenyl Ether (PPE)
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Three-ring polyphenyl ether (3P2E); trade name: MCS-2167
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and Carroll, J. G., Eds., Academic Press, New York, 1963
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to gamma and associated neutron radiation dosages of 1
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Four-ring polyphenyl ether (4P3E); trade name: MCS-210
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Five-ring polyphenyl ether (5P4E); trade name: OS-124
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Six-ring polyphenyl ether (6P5E); trade name: OS-138
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Table 1: commercial polyphenyl ether products (PPEs)
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High-temperature and radiation-resistant lubricants
228:Table 2: physical properties of polyphenyl ethers 141:The simplest member of the phenyl ether family is 112:Figure 5: structure of 3R2TE polyphenyl thioether 205:Diphenyl ether, diphenyl oxide, phenoxybenzene 837:http://www.xtronix.ch/pdf/Diffusion%20Pump.pdf 1406: 899: 825:https://www.nist.gov/srd/PDFfiles/jpcrd13.pdf 475:Table 3: diffusion fluid property comparison 93:-diphenoxybenzene), a simple polyphenyl ether 8: 612:Refractive index at 25 °C, 589 nm 1413: 1399: 1391: 1270: 906: 892: 884: 433:surrounding environment must be avoided. 473: 226: 189:Thiobis and bis (phenylmercapto)benzene 147: 107: 96: 80: 26: 18: 758: 996:Polyethylene terephthalate (PET, PETE) 936:Cross-linked polyethylene (PEX, XLPE) 931:Acrylonitrile butadiene styrene (ABS) 750:under the trademarked name of Noryl. 7: 1748:List of environmental health hazards 1668:List of environmental health hazards 471:processing, and vacuum engineering. 500:Vapor pressure, Torr at 25 °C 1553:Miscellaneous additives incl. PHCs 14: 1085: 1079: 971:Polybutylene terephthalate (PBT) 946:Poly(methyl methacrylate) (PMMA) 50:group as the repeating group in 951:Poly(ethyl methacrylate) (PEMA) 774:SANTOLUBES LLC Product Brochure 684:Electronic connector lubricants 584:Viscosity (cSt) at 100 °C 202:Two-ring diphenyl ether (2P1E) 173:m-Bis(m-phenoxyphenoxy)benzene 1314:Category:Plastics applications 1061:Styrene maleic anhydride (SMA) 1056:Polyvinylidene chloride (PVDC) 1041:Polytetrafluoroethylene (PTFE) 570:Viscosity (cSt) at 25 °C 556:Boiling point at 1.3 mbar, °C 121:: reaction of an alkali-metal 1: 1021:Poly(p-phenylene oxide) (PPO) 129:benzene catalyzed by copper. 1738:Persistent organic pollutant 1699:Toxic Substances Control Act 1658:Persistent organic pollutant 941:Ethylene vinyl acetate (EVA) 256:at 210 °F (99 °C) 251:at 100 °F (38 °C) 181:Bis (m-phenoxyphenyl) ether 101:Figure 4: Structure of 2R1E 1731:Great Pacific garbage patch 1653:Great Pacific garbage patch 1066:Styrene-acrylonitrile (SAN) 981:Polyetheretherketone (PEEK) 728:Polyphenylene oxides (PPOs) 1816: 1694:Japan Toxic Substances Law 1489:Miscellaneous plasticizers 731: 598:Surface tension, dynes/cm 383:Thermo-oxidative stability 1768: 1689:European REACH regulation 1684:California Proposition 65 1427:polyhalogenated compounds 1304:High-performance plastics 1129:High-performance plastics 1077: 748:SABIC Innovative Plastics 1114:Fibre-reinforced plastic 1051:Polyvinyl chloride (PVC) 451:Ultra-high-vacuum fluids 1165:Biodegradable additives 734:Poly(p-phenylene oxide) 119:Ullmann Ether Synthesis 87:Ullmann Ether Synthesis 77:Structure and synthesis 1580:Perfluorooctanoic acid 1016:Polyphenyl ether (PPE) 1011:Polyoxymethylene (POM) 956:Polyacrylic acid (PAA) 528:Density at 25 °C 321:3- and 4-ring oxythio 154:Common and trade name 113: 105: 94: 32: 24: 1760:Biodegradable plastic 1109:Thermosetting polymer 1006:Polylactic acid (PLA) 668:Radiation resistance 640:Oxidation resistance 111: 100: 84: 36:Phenyl ether polymers 30: 22: 1771:Identification codes 1371:Foam food containers 1294:Engineering plastics 654:Chemical resistance 65:polyphenylene oxides 1610:Endocrine disruptor 1208:Compression molding 1160:Polymer stabilizers 476: 413:perfluoropolyethers 399:Radiation stability 229: 212:Physical properties 197:m-Diphenoxybenzene 150: 1625:Polymer fume fever 1284:Commodity plastics 1258:Rotational molding 1228:Fiberglass molding 1188:Injection moulding 1170:Filler (materials) 1119:Corrugated plastic 1071:Tritan copolyester 1026:Polypropylene (PP) 976:Polycarbonate (PC) 626:Thermal stability 474: 244:Thermal stability 227: 222:ionizing radiation 148: 114: 106: 95: 33: 25: 1777: 1776: 1755:Plastic recycling 1721:Plastic pollution 1707: 1706: 1641:Plastic pollution 1421:Health issues of 1379: 1378: 1275:Plastics industry 1193:Plastic extrusion 1046:Polyurethane (PU) 1036:Polysulfone (PES) 991:Polyethylene (PE) 966:Polybutylene (PB) 681: 680: 514:Molecular weight 483:Polyphenyl ether 380: 379: 254:Viscosity (cSt), 249:Viscosity (cSt), 233:Polyphenyl ether 209: 208: 56:polyphenyl ethers 16:Class of polymers 1807: 1646:Rubber pollution 1496:Organophosphates 1415: 1408: 1401: 1392: 1271: 1243:Filament winding 1218:Transfer molding 1145:Polymer additive 1089: 1083: 1031:Polystyrene (PS) 908: 901: 894: 885: 879: 874: 868: 864: 858: 855: 849: 845: 839: 833: 827: 821: 815: 809: 803: 799: 793: 790: 784: 781: 775: 772: 766: 763: 542:Flash point, °C 493:Hydrocarbon oil 477: 469: 423: 418: 230: 151: 1815: 1814: 1810: 1809: 1808: 1806: 1805: 1804: 1780: 1779: 1778: 1773: 1764: 1709: 1708: 1703: 1672: 1629: 1586: 1548: 1515: 1484: 1430: 1419: 1385: 1375: 1324: 1262: 1248:Solvent bonding 1238:Plastic welding 1180: 1174: 1133: 1096: 1090: 1084: 1075: 986:Polyester (PEs) 923: 917: 912: 882: 875: 871: 865: 861: 856: 852: 846: 842: 834: 830: 822: 818: 810: 806: 800: 796: 791: 787: 782: 778: 773: 769: 764: 760: 756: 740:cuprous bromide 736: 730: 713: 704: 686: 494: 489: 484: 480:Fluid property 467: 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1636: 1632: 1626: 1623: 1621: 1618: 1616: 1613: 1611: 1608: 1606: 1603: 1601: 1598: 1597: 1595: 1593: 1592:Health issues 1589: 1581: 1578: 1577: 1576: 1573: 1571: 1568: 1566: 1563: 1561: 1558: 1557: 1555: 1551: 1544: 1540: 1537: 1534: 1530: 1527: 1526: 1524: 1522: 1518: 1511: 1508: 1506: 1502: 1499: 1497: 1494: 1493: 1491: 1487: 1481: 1478: 1476: 1473: 1470: 1467: 1465: 1462: 1459: 1456: 1454: 1451: 1449: 1446: 1445: 1443: 1441: 1437: 1433: 1428: 1424: 1416: 1411: 1409: 1404: 1402: 1397: 1396: 1393: 1388: 1382: 1372: 1369: 1367: 1366:Shopping bags 1364: 1362: 1359: 1357: 1354: 1352: 1349: 1347: 1344: 1342: 1339: 1337: 1334: 1333: 1331: 1327: 1321:(Agriculture) 1320: 1319:Plasticulture 1317: 1315: 1312: 1310: 1307: 1305: 1302: 1300: 1299:Geosynthetics 1297: 1295: 1292: 1290: 1287: 1285: 1282: 1281: 1279: 1276: 1272: 1269: 1265: 1259: 1256: 1254: 1251: 1249: 1246: 1244: 1241: 1239: 1236: 1234: 1231: 1229: 1226: 1224: 1221: 1219: 1216: 1214: 1211: 1209: 1206: 1204: 1203:Thermoforming 1201: 1199: 1196: 1194: 1191: 1189: 1186: 1185: 1183: 1177: 1171: 1168: 1166: 1163: 1161: 1158: 1156: 1153: 1151: 1148: 1146: 1143: 1142: 1140: 1136: 1130: 1127: 1125: 1122: 1120: 1117: 1115: 1112: 1110: 1107: 1105: 1104:Thermoplastic 1102: 1101: 1099: 1093: 1088: 1082: 1072: 1069: 1067: 1064: 1062: 1059: 1057: 1054: 1052: 1049: 1047: 1044: 1042: 1039: 1037: 1034: 1032: 1029: 1027: 1024: 1022: 1019: 1017: 1014: 1012: 1009: 1007: 1004: 1002: 999: 997: 994: 992: 989: 987: 984: 982: 979: 977: 974: 972: 969: 967: 964: 962: 959: 957: 954: 952: 949: 947: 944: 942: 939: 937: 934: 932: 929: 928: 926: 920: 916: 909: 904: 902: 897: 895: 890: 889: 886: 878: 873: 870: 863: 860: 854: 851: 844: 841: 838: 832: 829: 826: 820: 817: 814: 808: 805: 798: 795: 789: 786: 780: 777: 771: 768: 762: 759: 753: 751: 749: 745: 741: 735: 727: 725: 721: 717: 710: 708: 701: 699: 696: 690: 683: 676: 673: 670: 667: 666: 662: 659: 656: 653: 652: 648: 645: 642: 639: 638: 634: 631: 628: 625: 624: 620: 617: 614: 611: 610: 606: 603: 600: 597: 596: 592: 589: 586: 583: 582: 578: 575: 572: 569: 568: 564: 561: 558: 555: 554: 550: 547: 544: 541: 540: 536: 533: 530: 527: 526: 522: 519: 516: 513: 512: 508: 505: 502: 499: 498: 492: 487: 482: 479: 478: 472: 464: 461: 457: 450: 448: 445: 436: 434: 427: 425: 414: 409: 407: 406:isomerization 398: 396: 394: 389: 382: 375: 372: 370:316; >600 369: 366: 363: 360: 359: 355: 352: 349: 346: 343: 340: 339: 335: 332: 329: 326: 323: 320: 319: 315: 312: 309: 306: 304:Clear liquid 303: 300: 299: 295: 292: 289: 286: 284:Clear liquid 283: 280: 279: 275: 272: 269: 266: 264:Clear liquid 263: 260: 259: 253: 248: 243: 238: 235: 232: 231: 225: 223: 218: 211: 204: 201: 200: 196: 193: 192: 188: 185: 184: 180: 177: 176: 172: 169: 168: 164: 161: 160: 156: 153: 152: 146: 144: 139: 136: 130: 128: 124: 120: 110: 104: 99: 92: 88: 83: 76: 74: 71: 67: 66: 61: 57: 53: 49: 45: 41: 37: 29: 21: 1436:Plasticizers 1384:Environment 1336:Blister pack 1289:Construction 1198:Blow molding 1015: 872: 862: 853: 843: 831: 819: 807: 797: 788: 779: 770: 761: 737: 722: 718: 714: 705: 691: 687: 490:Dow Corning 465: 456:Vacuum pumps 454: 440: 437:Applications 431: 410: 402: 393:isoteniscope 390: 386: 361:2-ring 2P1E 341:3-ring 3P2E 324:Hazy liquid 301:4-ring 4P3E 281:5-ring 5P4E 261:6-ring 6P5E 219: 215: 140: 134: 131: 115: 90: 69: 63: 59: 55: 35: 34: 1677:Regulations 1529:Bisphenol A 1213:Calendering 1155:Plasticizer 1095:Mechanical 485:SANTOVAC 5 239:Pour point 236:Appearance 127:halogenated 48:thiophenoxy 1800:Lubricants 1795:Polyethers 1784:Categories 1605:Carcinogen 1570:Organotins 1440:Phthalates 1386:and health 1233:Pultrusion 1223:Laminating 1181:processing 754:References 716:bearings. 671:Excellent 657:Excellent 649:Poor-fair 646:Excellent 643:Excellent 629:Excellent 165:Bis ether 85:Figure 3: 1634:Pollution 1600:Teratogen 1531:(BPA, in 1179:Plastics 1150:Colorants 1138:Additives 922:Chemical 867:Publisher 488:Silicone 350:427; 800 330:367; 693 327:−29; −20 310:441; 825 290:453; 847 270:447; 836 246:(°C; °F) 241:(°C; °F) 89:of 4R2E ( 1790:Plastics 1615:Diabetes 1521:Monomers 1501:Adipates 1423:plastics 1277:segments 1267:Products 915:Plastics 848:failures 744:pyridine 695:fretting 495:Apiezon 307:−12; 10 287:4.5; 40 40:polymers 1743:Dioxins 1663:Dioxins 1620:Obesity 1361:Cutlery 1351:Bottles 267:10; 50 138:known. 125:with a 123:phenate 62:s) and 44:phenoxy 1460:(BBzP) 1429:(PHCs) 1341:Chairs 1309:Nurdle 702:Optics 364:Solid 344:Solid 1714:Waste 1560:PBDEs 1471:(DOP) 1097:types 924:types 677:Fair 674:Good 663:Poor 660:Good 635:Poor 632:Good 621:1.48 618:1.56 615:1.67 607:30.5 604:30.5 601:49.9 587:12.0 573:1000 537:0.87 534:1.07 531:1.20 509:5×10 506:2×10 503:4×10 273:2000 52:ether 46:or a 1575:PFCs 1565:PCBs 1541:(in 1505:DEHA 1480:DINP 1475:DIDP 1469:DEHP 1464:DIHP 1448:DIBP 1425:and 1356:Bags 742:and 593:7.0 590:4.3 579:135 565:220 562:223 559:295 551:243 548:221 545:288 523:420 520:484 517:446 376:1.6 373:2.4 293:360 1543:PVC 1510:DOA 1458:BBP 1453:DBP 576:40 353:12 333:25 313:70 296:13 276:25 70:PPO 60:PPE 1786:: 1438:: 367:- 356:3 347:- 336:4 316:6 1545:) 1535:) 1512:) 1503:( 1414:e 1407:t 1400:v 907:e 900:t 893:v 468:× 422:× 417:× 135:n 91:p 68:( 58:(

Index



polymers
phenoxy
thiophenoxy
ether
polyphenylene oxides

Ullmann Ether Synthesis

diphenyl ether

Ullmann Ether Synthesis
phenate
halogenated
diphenyl ether
ionizing radiation
isoteniscope
isomerization
perfluoropolyethers
diffusion pump
Vacuum pumps
diffusion pumps
fretting
Poly(p-phenylene oxide)
cuprous bromide
pyridine
SABIC Innovative Plastics
http://www.chemassociates.com/products/findett/PPEs_Radiation2.pdf
https://www.nist.gov/srd/PDFfiles/jpcrd13.pdf

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