Knowledge (XXG)

Polyamide

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741: 1971: 365: 338: 747: 1981: 223:), α,ω-amino acids or a stoichiometric mixture of a diamine and a diacid. Both these kinds of precursors give a homopolymer. Polyamides are easily copolymerized, and thus many mixtures of monomers are possible which can in turn lead to many copolymers. Additionally many nylon polymers are miscible with one another allowing the creation of blends. 297: 70:. Synthetic polyamides are commonly used in textiles, automotive industry, carpets, kitchen utensils and sportswear due to their high durability and strength. The transportation manufacturing industry is the major consumer, accounting for 35% of polyamide (PA) consumption. 289:). The resulting polyamides are known as proteins or polypeptides. In the diagram below, consider the amino-acids as single aliphatic monomers reacting with identical molecules to form a polyamide, focusing on solely the amine and acid groups. Ignore the substituent 1348: 219:
All polyamides are made by the formation of an amide function to link two molecules of monomer together. The monomers can be amides themselves (usually in the form of a cyclic lactam such as
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group. The hydroxyl from the carboxylic acid combines with a hydrogen from the amine, and gives rise to water, the elimination byproduct that is the namesake of the reaction.
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Magat, Eugene E.; Faris, Burt F.; Reith, John E.; Salisbury, L. Frank (1951-03-01). "Acid-catalyzed Reactions of Nitriles. I. The Reaction of Nitriles with Formaldehyde1".
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itself does not participate in elimination reaction, but it does increase the rigidity and strength of the resulting material which leads to Kevlar's renowned strength.
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Polyamides can also be synthesized from dinitriles using acid catalysis via an application of the Ritter reaction. This method is applicable for preparation of
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linkage. This process involves the elimination of other atoms previously part of the functional groups. The carbonyl-component may be part of either a
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derivative. The amine group and the carboxylic acid group can be on the same monomer, or the polymer can be constituted of two different
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Production of polymers requires the repeated joining of two groups to form an amide linkage. In this case this specifically involves
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is made from two different monomers which continuously alternate to form the polymer chain. Aramids are aromatic polyamides:
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Lakouraj, Moslem Mansour; Mokhtary, Masoud (2009-02-20). "Synthesis of polyamides from p-Xylylene glycol and dinitriles".
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is used to synthetically produce nylon polymers in industry. Nylons must specifically include a straight chain (
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The reaction of 1,4-phenyl-diamine (para-phenylenediamine) and terephthaloyl chloride to produce an aramid
274:) monomer. The amide link is produced from an amine group (alternatively known as an amino group), and a 1419: 1123: 768: 267: 55: 2015: 1812: 1774: 1454: 1139: 1134: 1107: 1025: 196: 166: 67: 2005: 1787: 1670: 1269: 1030: 953: 867: 819: 368:
Synthesis of Nylon 1,6 from adiponitrile, formaldehyde, and water using sulfuric acid as a catalyst
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According to the composition of their main chain, synthetic polyamides are classified as follows:
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monomers, one with two amine groups, the other with two carboxylic acid or acid chloride groups.
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Polyamides occur both naturally and artificially. Examples of naturally occurring polyamides are
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Palmer, R. J. 2001. Polyamides, Plastics. Encyclopedia Of Polymer Science and Technology.
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is used as a monomer. The polymerization reaction with the amine group eliminates
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Kohan, Melvin I. (1995). Nylon Plastics Handbook. Hanser/Gardner Publications.
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are condensed with one another by an enzyme to form amide linkages (known as
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The reaction of two amino acids. Many of these reactions produce long chain
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As an example of condensation reactions, consider that in living organisms,
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and water. Additionally, polyamides can be synthesized from
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Macromolecule with repeating units linked by amide bonds
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Market Study Engineering Plastics, Ceresana, Sep 2013
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PHCs 14: 307:For fully aromatic polyamides or 1979: 1970: 1969: 745: 739: 631:Polybutylene terephthalate (PBT) 606:Poly(methyl methacrylate) (PMMA) 611:Poly(ethyl methacrylate) (PEMA) 974:Category:Plastics applications 721:Styrene maleic anhydride (SMA) 716:Polyvinylidene chloride (PVDC) 701:Polytetrafluoroethylene (PTFE) 1: 681:Poly(p-phenylene oxide) (PPO) 1398:Persistent organic pollutant 1359:Toxic Substances Control Act 1318:Persistent organic pollutant 601:Ethylene vinyl acetate (EVA) 433:. Royal Society of Chemistry 384:Pyrrole–imidazole polyamides 1391:Great Pacific garbage patch 1313:Great Pacific garbage patch 726:Styrene-acrylonitrile (SAN) 641:Polyetheretherketone (PEEK) 489:Journal of Polymer Research 255:group or the more reactive 145:, Rilsan and Rilsamid from 58:yielding materials such as 2034: 1354:Japan Toxic Substances Law 1149:Miscellaneous plasticizers 52:step-growth polymerization 1965: 1428: 1349:European REACH regulation 1344:California Proposition 65 1087:polyhalogenated compounds 964:High-performance plastics 789:High-performance plastics 737: 501:10.1007/s10965-009-9273-z 408:10.1002/0471440264.pst251 330:In the diagram below, an 774:Fibre-reinforced plastic 711:Polyvinyl chloride (PVC) 227:Polymerization chemistry 187:Aromatic polyamides, or 179:Industries, Amodel from 825:Biodegradable additives 1240:Perfluorooctanoic acid 676:Polyphenyl ether (PPE) 671:Polyoxymethylene (POM) 616:Polyacrylic acid (PAA) 369: 342: 304: 239:group, and a terminal 213:, Kermel from Kermel. 1420:Biodegradable plastic 769:Thermosetting polymer 666:Polylactic acid (PLA) 367: 340: 299: 268:condensation reaction 56:solid-phase synthesis 1431:Identification codes 1031:Foam food containers 954:Engineering plastics 315:, the more reactive 197:Paraphenylenediamine 167:hexamethylenediamine 108:Commercial products 68:sodium polyaspartate 1270:Endocrine disruptor 868:Compression molding 820:Polymer stabilizers 466:10.1021/ja01147a042 199:+ terephthalic acid 1285:Polymer fume fever 944:Commodity plastics 918:Rotational molding 888:Fiberglass molding 848:Injection moulding 830:Filler (materials) 779:Corrugated plastic 731:Tritan copolyester 686:Polypropylene (PP) 636:Polycarbonate (PC) 370: 343: 305: 1993: 1992: 1961: 1960: 1737: 1736: 1437: 1436: 1415:Plastic recycling 1381:Plastic pollution 1367: 1366: 1301:Plastic pollution 1081:Health issues of 1039: 1038: 935:Plastics industry 853:Plastic extrusion 706:Polyurethane (PU) 696:Polysulfone (PES) 651:Polyethylene (PE) 626:Polybutylene (PB) 321:hydrogen chloride 217: 216: 171:terephthalic acid 2023: 1983: 1982: 1973: 1972: 1748: 1484: 1464: 1457: 1450: 1441: 1306:Rubber pollution 1156:Organophosphates 1075: 1068: 1061: 1052: 931: 903:Filament winding 878:Transfer molding 805:Polymer additive 749: 743: 691:Polystyrene (PS) 568: 561: 554: 545: 521: 520: 484: 478: 477: 460:(3): 1028–1031. 449: 443: 442: 440: 438: 427: 421: 416: 410: 400: 245:functional group 175:Trogamid T from 158:Polyphthalamides 96: 2033: 2032: 2026: 2025: 2024: 2022: 2021: 2020: 1996: 1995: 1994: 1989: 1957: 1850: 1817: 1769: 1760:Artificial silk 1733: 1715: 1602: 1473: 1468: 1438: 1433: 1424: 1369: 1368: 1363: 1332: 1289: 1246: 1208: 1175: 1144: 1090: 1079: 1045: 1035: 984: 922: 908:Solvent bonding 898:Plastic welding 840: 834: 793: 756: 750: 744: 735: 646:Polyester (PEs) 583: 577: 572: 530: 528:Further reading 525: 524: 486: 485: 481: 451: 450: 446: 436: 434: 429: 428: 424: 417: 413: 401: 397: 392: 379:Polyamide-imide 375: 276:carboxylic acid 253:carboxylic acid 243:component of a 229: 149:, Radipol from 141:, Technyl from 76: 29:repeating units 17: 12: 11: 5: 2031: 2030: 2027: 2019: 2018: 2013: 2011:Thermoplastics 2008: 1998: 1997: 1991: 1990: 1988: 1987: 1977: 1966: 1963: 1962: 1959: 1958: 1956: 1955: 1950: 1945: 1940: 1935: 1930: 1929: 1928: 1918: 1913: 1908: 1903: 1898: 1893: 1892: 1891: 1886: 1881: 1876: 1866: 1860: 1858: 1852: 1851: 1849: 1848: 1843: 1838: 1833: 1827: 1825: 1819: 1818: 1816: 1815: 1810: 1805: 1800: 1795: 1790: 1785: 1779: 1777: 1775:Semi-synthetic 1771: 1770: 1768: 1767: 1762: 1756: 1754: 1745: 1739: 1738: 1735: 1734: 1732: 1731: 1725: 1723: 1717: 1716: 1714: 1713: 1708: 1703: 1698: 1693: 1688: 1683: 1678: 1673: 1668: 1663: 1658: 1653: 1648: 1643: 1638: 1633: 1628: 1623: 1618: 1612: 1610: 1604: 1603: 1601: 1600: 1595: 1590: 1585: 1580: 1575: 1570: 1565: 1560: 1555: 1550: 1545: 1540: 1539: 1538: 1528: 1523: 1518: 1513: 1508: 1503: 1498: 1492: 1490: 1481: 1475: 1474: 1469: 1467: 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827: 822: 817: 812: 807: 801: 799: 795: 794: 792: 791: 786: 784:Polymeric foam 781: 776: 771: 766: 760: 758: 752: 751: 738: 736: 734: 733: 728: 723: 718: 713: 708: 703: 698: 693: 688: 683: 678: 673: 668: 663: 661:Polyimide (PI) 658: 653: 648: 643: 638: 633: 628: 623: 621:Polyamide (PA) 618: 613: 608: 603: 598: 593: 587: 585: 579: 578: 573: 571: 570: 563: 556: 548: 542: 541: 529: 526: 523: 522: 479: 444: 422: 411: 394: 393: 391: 388: 387: 386: 381: 374: 371: 228: 225: 215: 214: 200: 194: 191: 184: 183: 173: 163: 160: 154: 153: 132: 120: 117: 110: 109: 106: 103: 100: 75: 74:Classification 72: 15: 13: 10: 9: 6: 4: 3: 2: 2029: 2028: 2017: 2014: 2012: 2009: 2007: 2004: 2003: 2001: 1986: 1978: 1976: 1968: 1967: 1964: 1954: 1951: 1949: 1946: 1944: 1941: 1939: 1936: 1934: 1931: 1927: 1924: 1923: 1922: 1919: 1917: 1914: 1912: 1909: 1907: 1904: 1902: 1899: 1897: 1894: 1890: 1887: 1885: 1882: 1880: 1877: 1875: 1872: 1871: 1870: 1867: 1865: 1862: 1861: 1859: 1857: 1853: 1847: 1844: 1842: 1839: 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chloride 314: 310: 303: 298: 294: 292: 288: 284: 279: 277: 273: 269: 264: 262: 258: 254: 250: 246: 242: 238: 234: 226: 224: 222: 212: 208: 204: 201: 198: 195: 192: 190: 186: 185: 182: 178: 174: 172: 168: 164: 162:Semi-aromatic 161: 159: 156: 155: 152: 148: 144: 140: 136: 133: 131: 127: 124: 121: 118: 115: 112: 111: 107: 104: 101: 98: 97: 94: 91: 89: 85: 82:are known as 81: 73: 71: 69: 65: 61: 57: 53: 49: 45: 41: 36: 34: 30: 26: 22: 1921:Polyethylene 1096:Plasticizers 1044:Environment 996:Blister pack 949:Construction 858:Blow molding 620: 492: 488: 482: 457: 453: 447: 435:. Retrieved 425: 414: 398: 355:formaldehyde 351:adiponitrile 344: 329: 308: 306: 280: 265: 261:bifunctional 230: 218: 151:Radici Group 92: 84:polypeptides 78:Polymers of 77: 37: 20: 18: 2016:Dielectrics 1752:Regenerated 1696:Spider silk 1337:Regulations 1189:Bisphenol A 873:Calendering 815:Plasticizer 755:Mechanical 283:amino acids 257:acyl halide 221:caprolactam 80:amino acids 2006:Polyamides 2000:Categories 1901:Modacrylic 1896:Microfiber 1813:Triacetate 1765:Milk fiber 1631:Camel hair 1563:Lotus silk 1265:Carcinogen 1230:Organotins 1100:Phthalates 1046:and health 893:Pultrusion 883:Laminating 841:processing 495:(6): 681. 390:References 116:polyamides 102:Main chain 42:, such as 31:linked by 1916:Polyester 1788:Diacetate 1743:Synthetic 1646:Chiengora 1294:Pollution 1260:Teratogen 1191:(BPA, in 839:Plastics 810:Colorants 798:Additives 582:Chemical 509:1022-9760 474:0002-7863 347:nylon 1,6 272:aliphatic 119:Aliphatic 114:Aliphatic 21:polyamide 1975:Category 1884:Technora 1846:Metallic 1729:Asbestos 1671:Pashmina 1636:Cashmere 1275:Diabetes 1181:Monomers 1161:Adipates 1083:plastics 937:segments 927:Products 575:Plastics 517:98232570 437:19 April 373:See also 302:proteins 291:R groups 287:peptides 241:carbonyl 193:Aromatic 165:PA 6T = 105:Examples 88:proteins 40:proteins 1985:Commons 1943:Vinylon 1938:Vectran 1933:Spandex 1864:Acrylic 1856:Polymer 1823:Mineral 1803:Piñatex 1793:Lyocell 1783:Acetate 1721:Mineral 1651:Guanaco 1501:Bagasse 1479:Natural 1403:Dioxins 1323:Dioxins 1280:Obesity 1021:Cutlery 1011:Bottles 359:glycols 309:aramids 189:aramids 64:aramids 35:bonds. 25:polymer 1948:Vinyon 1926:UHMWPE 1911:Olefin 1879:Kevlar 1874:Twaron 1869:Aramid 1841:Basalt 1836:Carbon 1706:Vicuña 1691:Tendon 1681:Rabbit 1676:Qiviut 1666:Mohair 1641:Catgut 1626:Byssus 1621:Angora 1616:Alpaca 1608:Animal 1588:Rattan 1578:Raffia 1521:Cotton 1506:Bamboo 1471:Fibers 1120:(BBzP) 1089:(PHCs) 1001:Chairs 969:Nurdle 537:  515:  507:  472:  332:aramid 325:moiety 313:Kevlar 211:Teijin 203:Kevlar 181:Solvay 177:Evonik 147:Arkema 143:Solvay 139:DuPont 99:Family 66:, and 60:nylons 1953:Zylon 1906:Nylon 1889:Nomex 1831:Glass 1808:Rayon 1798:Modal 1661:Llama 1593:Sisal 1583:Ramie 1558:Kenaf 1553:Kapok 1536:Linen 1526:Fique 1511:BashĹŤ 1496:Abacá 1488:Plant 1374:Waste 1220:PBDEs 1131:(DOP) 757:types 584:types 513:S2CID 349:from 311:e.g. 249:amide 237:amine 233:amide 207:Nomex 137:from 135:Zytel 130:PA 66 123:Nylon 33:amide 27:with 23:is a 1701:Wool 1686:Silk 1656:Hair 1598:Wood 1573:Pine 1568:Piña 1548:Jute 1543:Hemp 1531:Flax 1516:Coir 1235:PFCs 1225:PCBs 1201:(in 1165:DEHA 1140:DINP 1135:DIDP 1129:DEHP 1124:DIHP 1108:DIBP 1085:and 1016:Bags 535:ISBN 505:ISSN 470:ISSN 439:2015 266:The 205:and 128:and 126:PA 6 48:silk 46:and 44:wool 1711:Yak 1203:PVC 1170:DOA 1118:BBP 1113:DBP 497:doi 462:doi 404:doi 86:or 54:or 2002:: 1098:: 511:. 503:. 493:16 491:. 468:. 458:73 456:. 353:, 169:+ 90:. 62:, 19:A 1463:e 1456:t 1449:v 1205:) 1195:) 1172:) 1163:( 1074:e 1067:t 1060:v 567:e 560:t 553:v 519:. 499:: 476:. 464:: 441:. 406::

Index

polymer
repeating units
amide
proteins
wool
silk
step-growth polymerization
solid-phase synthesis
nylons
aramids
sodium polyaspartate
amino acids
polypeptides
proteins
Aliphatic
Nylon
PA 6
PA 66
Zytel
DuPont
Solvay
Arkema
Radici Group
Polyphthalamides
hexamethylenediamine
terephthalic acid
Evonik
Solvay
aramids
Paraphenylenediamine

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