Knowledge (XXG)

Thermosetting polymer

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adjusted from the molecular weight and functionality of isocyanate resins, prepolymers, and the exact combinations of diols, triols and polyols selected, with the rate of reaction being strongly influenced by catalysts and inhibitors; polyureas form virtually instantaneously when isocyanate resins are combined with long-chain amine functional polyether or polyester resins and short-chain diamine extenders – the amine-isocyanate nucleophilic addition reaction does not require catalysts. Polyureas also form when isocyanate resins come into contact with moisture;
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formed and highly branched crosslinked structures develop, the rate of cure being influenced by the physical form and functionality of epoxy resins and curing agents – elevated temperature postcuring induces secondary crosslinking of backbone hydroxyl functionality which condense to form ether bonds;
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composites, which are used in the fabrication of factory-finished structural composite OEM or replacement parts, and as site-applied, cured and finished composite repair and protection materials. When used as the binder for aggregates and other solid fillers, they form particulate-reinforced polymer
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and re-shaped after they are cured. This usually prevents recycling for the same purpose, except as filler material. New developments involving thermoset epoxy resins which on controlled and contained heating form crosslinked networks permit repeatedly reshaping, like silica glass by reversible
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Epoxy functional resins can be homo-polymerized with anionic or cationic catalysts and heat, or copolymerised through nucleophilic addition reactions with multifunctional crosslinking agents which are also known as curing agents or hardeners. As reaction proceeds, larger and larger molecules are
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Polyurethanes form when isocyanate resins and prepolymers are combined with low- or high-molecular weight polyols, with strict stoichiometric ratios being essential to control nucleophilic addition polymerisation – the degree of crosslinking and resulting physical type (elastomer or plastic) is
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applications up to the decomposition temperature since they keep their shape as strong covalent bonds between polymer chains cannot be broken easily. The higher the crosslink density and aromatic content of a thermoset polymer, the higher the resistance to heat degradation and chemical attack.
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resins all cured by polycondensation involving the release of water and heat, with cure initiation and polymerisation exotherm control influenced by curing temperature, catalyst selection or loading and processing method or pressure – the degree of pre-polymerisation and level of residual
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Thermosetting polymer mixtures based on thermosetting resin monomers and pre-polymers can be formulated and applied and processed in a variety of ways to create distinctive cured properties that cannot be achieved with thermoplastic polymers or inorganic materials.
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diluents, with cure initiated by free radicals generated from ionizing radiation or by the photolytic or thermal decomposition of a radical initiator – the intensity of crosslinking is influenced by the degree of backbone unsaturation in the prepolymer;
309:: insulating foams, mattresses, coatings, adhesives, car parts, print rollers, shoe soles, flooring, synthetic fibers, etc. Polyurethane polymers are formed by combining two bi- or higher functional monomers/oligomers. 1776: 244:
covalent bond exchange reactions on reheating above the glass transition temperature. There are also thermoset polyurethanes shown to have transient properties and which can thus be reprocessed or recycled.
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Hard, plastic thermosets may undergo permanent or plastic deformation under load. Elastomers, which are soft and springy or rubbery and can be deformed and revert to their original shape on loading release.
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or polycyanurates for electronics applications with need for dielectric properties and high glass temperature requirements in aerospace structural composite components.
377:, used alone or hybridised with epoxy and phenolic resins, for structural prepregs, liquid molding and film adhesives for composite construction, bonding and repair. 775:; Marc A. Hillmyer; William R. Dichtel (2015). "Mechanically Activated, Catalyst-Free Polyhydroxyurethane Vitrimers". Journal of the American Chemical Society. 833:
Guzman, Enrique; Cugnoni, Joël; Gmür, Thomas (2014). "Multi-Factorial Models of a Carbon Fibre/Epoxy Composite Subjected to Accelerated Environmental Ageing".
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Reactive Polymers Fundamentals and Applications: A Concise Guide to Industrial Polymers (Plastics Design Library), William Andrew Inc., 2nd edition, 2013,
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fiberglass systems: sheet molding compounds and bulk molding compounds; filament winding; wet lay-up lamination; repair compounds and protective coatings.
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used in printed circuit boards and in body parts of modern aircraft, aerospace composite structures, as a coating material and for glass reinforced pipes.
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Mechanical strength and hardness also improve with crosslink density, although at the expense of brittleness. They normally decompose before melting.
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Roberto C. Dante, Diego A. Santamaría and Jesús Martín Gil (2009). "Crosslinking and thermal stability of thermosets based on novolak and melamine".
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are cured by an exothermal ring-opening polymerisation without releasing any chemical, which translates in near zero shrinkage upon polymerisation.
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polymers which are commonly produced and distributed in the form of pellets, and shaped into the final product form by melting, pressing, or
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Kulkarni, Romit; Wappler, Peter; Soltani, Mahdi; Haybat, Mehmet; Guenther, Thomas; Groezinger, Tobias; Zimmermann, André (1 February 2019).
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composites, which are used for factory-applied protective coating or component manufacture, and for site-applied and cured construction, or
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resins used in the manufacture of sustainable biocomposite construction, cements, adhesives, coatings and casting/foundry resins.
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Diallyl-phthalate (DAP) used in high temperature and mil-spec electrical connectors and other components. Usually glass filled.
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ISO 24817 Composite Repairs for Pipework: Qualification and Design, Installation, Testing and Inspection, 2015, ICS: 75.180.20
1771: 1750: 1647: 1401: 632: 862:"An Assessment of Thermoset Injection Molding for Thin-Walled Conformal Encapsulation of Board-Level Electronic Packages" 1825: 1745: 701:
Industrial Polymer Applications: Essential Chemistry and Technology, Royal Society of Chemistry, UK, 1st edition, 2016,
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Epoxy novolac resins used for printed circuit boards, electrical encapsulation, adhesives and coatings for metal.
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resins used for wet lay-up laminating, molding and fast setting industrial protection and repair materials.
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materials due to the three-dimensional network of bonds (crosslinking), and are also better suited to high-
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Concise Encyclopedia of Polymer Science and Engineering, ed. J.I. Kroschwitz, Wiley, New York, 1990,
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with unsaturated sites at the ends or on the backbone are generally linked by copolymerisation with
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PCC-2 Repair of Pressure Equipment and Piping, American Society of Mechanical Engineers, 2015,
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or chain extension through the formation of covalent bonds between individual chains of the
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Polymer Matrix Composites: Materials Usage, Design, and Analysis, SAE International, 2012,
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used for thermoset polymer matrix composites and as ceramic matrix composite precursors.
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Mold or mold runners (the black plastic part in integrated circuits or semiconductors).
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T Malaba, J Wang, Journal of Composites, vol. 2015, Article ID 707151, 8 pages, 2015.
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Chemistry and Technology of Epoxy Resins, ed. B. Ellis, Springer Netherlands, 1993,
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Unsaturated Polyester Technology, ed. P.F. Bruins, Gordon and Breach, New York, 1976
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D. Montarnal, M. Capelot, F. Tournilhac, L. Leibler, Science, 2011, 334, 965-968],
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Polyurethane Handbook, ed. G Oertel, Hanser, Munich, Germany, 2nd edition, 1994,
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hydroxymethyl content in the resins determine the crosslink density.
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Design and Manufacture with Polymers: Introduction to Polymers
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Application/process uses and methods for thermosets include
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hybrids used for abrasion resistant waterproofing coatings.
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Polymer obtained by irreversibly hardening (curing) a resin
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Ishiwata, Hajimu; Inoue, Takiko; Tanimura, Akio (1986).
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Conventional thermoset plastics or elastomers cannot be
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When compounded with fibers, thermosetting resins form
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or liquid prior to curing, and is often designed to be
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and may be promoted by high pressure or mixing with a
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resin used in electrical insulators and plasticware.
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USA: William Andrew. 277:such as glass-reinforced plastic and 273:used as the matrix component in many 104:between polymer chains to produce an 7: 1836:List of environmental health hazards 1756:List of environmental health hazards 46:to give a rigid 3D thermoset polymer 1641:Miscellaneous additives incl. PHCs 895:Journal of Applied Polymer Science 579:Compendium of Chemical Terminology 74:") a soft solid or viscous liquid 37:: individual linear polymer chains 25: 115:The starting material for making 42:: Polymer chains which have been 1173: 1167: 1059:Polybutylene terephthalate (PBT) 1034:Poly(methyl methacrylate) (PMMA) 847:10.1016/j.compstruct.2013.12.028 1039:Poly(ethyl methacrylate) (PEMA) 926:Food Additives and Contaminants 173:Acrylic resins, polyesters and 1402:Category:Plastics applications 1149:Styrene maleic anhydride (SMA) 1144:Polyvinylidene chloride (PVDC) 1129:Polytetrafluoroethylene (PTFE) 720:Handbook of Thermoset Plastics 1: 1109:Poly(p-phenylene oxide) (PPO) 1826:Persistent organic pollutant 1787:Toxic Substances Control Act 1746:Persistent organic pollutant 1029:Ethylene vinyl acetate (EVA) 429:for jointing and injection, 1819:Great Pacific garbage patch 1741:Great Pacific garbage patch 1154:Styrene-acrylonitrile (SAN) 1069:Polyetheretherketone (PEEK) 673:Polymer Properties Database 545:Fusion bonded epoxy coating 279:graphite-reinforced plastic 1899: 1782:Japan Toxic Substances Law 1577:Miscellaneous plasticizers 248:Fiber-reinforced materials 1856: 1777:European REACH regulation 1772:California Proposition 65 1515:polyhalogenated compounds 1392:High-performance plastics 1217:High-performance plastics 1165: 938:10.1080/02652038609373566 275:fiber reinforced plastics 1202:Fibre-reinforced plastic 1139:Polyvinyl chloride (PVC) 592:10.1351/goldbook.TT07168 550:Thermoset polymer matrix 254:fiber-reinforced polymer 1253:Biodegradable additives 761:10.1126/science.1212648 512:thermosetting plastics) 1883:Thermosetting plastics 1668:Perfluorooctanoic acid 1104:Polyphenyl ether (PPE) 1099:Polyoxymethylene (POM) 1044:Polyacrylic acid (PAA) 47: 1848:Biodegradable plastic 1197:Thermosetting polymer 1094:Polylactic acid (PLA) 773:Christopher J. Cramer 584:thermosetting polymer 451:electrical insulation 56:thermosetting polymer 33: 1859:Identification codes 1459:Foam food containers 1382:Engineering plastics 835:Composite Structures 781:10.1021/jacs.5b08084 518:(used for producing 66:that is obtained by 1698:Endocrine disruptor 1296:Compression molding 1248:Polymer stabilizers 964:10.1155/2015/707151 879:10.3390/jmmp3010018 502:Compression molding 179:unsaturated monomer 1713:Polymer fume fever 1372:Commodity plastics 1346:Rotational molding 1316:Fiberglass molding 1276:Injection moulding 1258:Filler (materials) 1207:Corrugated plastic 1159:Tritan copolyester 1114:Polypropylene (PP) 1064:Polycarbonate (PC) 669:"Polybenzoxazines" 490:injection moulding 415:protective coating 48: 1878:Polymer chemistry 1865: 1864: 1843:Plastic recycling 1809:Plastic pollution 1795: 1794: 1729:Plastic pollution 1509:Health issues of 1467: 1466: 1363:Plastics industry 1281:Plastic extrusion 1134:Polyurethane (PU) 1124:Polysulfone (PES) 1079:Polyethylene (PE) 1054:Polybutylene (PB) 907:10.1002/app.31114 813:978-0-7918-6959-8 797:978-0-7680-7813-8 729:978-1-4557-3107-7 617:978-94-010-5302-0 528:gaming miniatures 496:Extrusion molding 433:, foundry sands, 423:civil engineering 419:seamless flooring 353:Urea-formaldehyde 323:Vulcanized rubber 137:injection molding 112:polymer network. 58:, often called a 52:materials science 16:(Redirected from 1890: 1734:Rubber pollution 1584:Organophosphates 1503: 1496: 1489: 1480: 1359: 1331:Filament winding 1306:Transfer molding 1233:Polymer additive 1177: 1171: 1119:Polystyrene (PS) 996: 989: 982: 973: 966: 956: 950: 949: 917: 911: 910: 901:(6): 4059–4065. 890: 884: 883: 881: 857: 851: 850: 830: 824: 821: 815: 805: 799: 789: 783: 769: 763: 753: 747: 740: 734: 733: 715: 709: 699: 693: 683: 677: 676: 665: 659: 649: 643: 625: 619: 609: 603: 600: 594: 571: 475:filament winding 209:Polybenzoxazines 143:Chemical process 21: 1898: 1897: 1893: 1892: 1891: 1889: 1888: 1887: 1868: 1867: 1866: 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1049:Polyamide (PA) 1046: 1041: 1036: 1031: 1026: 1021: 1015: 1013: 1007: 1006: 1001: 999: 998: 991: 984: 976: 968: 967: 951: 912: 885: 852: 841:(4): 179–192. 825: 816: 800: 784: 764: 748: 735: 728: 710: 707:978-1782628149 694: 691:0-471-5 1253-2 678: 660: 657:978-1455731497 644: 641:978-1569901571 620: 604: 595: 565: 564: 562: 559: 558: 557: 552: 547: 540: 537: 536: 535: 513: 499: 493: 410: 407: 406: 405: 399: 393: 387: 381: 378: 372: 369: 366: 363:Melamine resin 360: 350: 340: 326: 320: 310: 304: 298: 295:Cyanate esters 292: 282: 266: 263: 249: 246: 220: 217: 144: 141: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1895: 1884: 1881: 1879: 1876: 1875: 1873: 1860: 1855: 1849: 1846: 1844: 1841: 1837: 1834: 1832: 1829: 1827: 1824: 1820: 1817: 1816: 1815: 1814:Garbage patch 1812: 1811: 1810: 1807: 1806: 1804: 1800: 1788: 1785: 1783: 1780: 1778: 1775: 1773: 1770: 1769: 1767: 1763: 1757: 1754: 1752: 1749: 1747: 1744: 1742: 1739: 1735: 1732: 1731: 1730: 1727: 1726: 1724: 1720: 1714: 1711: 1709: 1706: 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661: 658: 654: 648: 645: 642: 638: 634: 630: 624: 621: 618: 614: 608: 605: 599: 596: 593: 589: 585: 581: 580: 575: 570: 567: 560: 556: 555:Vulcanization 553: 551: 548: 546: 543: 542: 538: 533: 529: 525: 521: 520:fishing lures 517: 514: 511: 507: 503: 500: 497: 494: 491: 487: 486: 485: 482: 480: 476: 472: 468: 464: 460: 456: 455:encapsulation 452: 448: 444: 440: 436: 432: 428: 425:construction 424: 420: 416: 408: 403: 400: 397: 394: 391: 388: 385: 382: 379: 376: 373: 370: 367: 364: 361: 358: 355:foam used in 354: 351: 348: 344: 341: 338: 334: 330: 327: 324: 321: 318: 314: 311: 308: 307:Polyurethanes 305: 302: 299: 296: 293: 290: 289:Bismaleimides 286: 283: 280: 276: 272: 269: 268: 264: 262: 260: 255: 247: 245: 242: 237: 233: 230: 226: 225:thermoplastic 218: 216: 212: 210: 206: 203: 199: 195: 191: 187: 183: 180: 176: 171: 169: 165: 161: 157: 153: 149: 142: 140: 138: 134: 133:thermoplastic 130: 126: 122: 118: 113: 111: 107: 103: 102:cross-linking 99: 98: 93: 89: 85: 81: 77: 73: 69: 65: 61: 57: 53: 45: 41: 36: 32: 19: 18:Thermosetting 1524:Plasticizers 1472:Environment 1424:Blister pack 1377:Construction 1286:Blow molding 1196: 954: 932:(1): 63–69. 929: 925: 915: 898: 894: 888: 869: 865: 855: 838: 834: 828: 819: 803: 787: 767: 751: 743: 738: 719: 713: 697: 681: 672: 663: 647: 623: 607: 598: 577: 569: 516:Spin casting 483: 465:laminating, 412: 409:Applications 375:Benzoxazines 337:formaldehyde 317:polyurethane 251: 238: 234: 222: 213: 207: 192: 188: 184: 175:vinyl esters 172: 164:crosslinking 146: 116: 114: 95: 91: 70:hardening (" 68:irreversibly 59: 55: 49: 44:cross linked 39: 34: 1765:Regulations 1617:Bisphenol A 1301:Calendering 1243:Plasticizer 1183:Mechanical 402:Vinyl ester 271:Epoxy resin 259:maintenance 229:temperature 119:is usually 1872:Categories 1693:Carcinogen 1658:Organotins 1528:Phthalates 1474:and health 1321:Pultrusion 1311:Laminating 1269:processing 633:1569901570 561:References 467:pultrusion 463:wet lay-up 285:Polyimides 261:purposes. 219:Properties 117:thermosets 76:prepolymer 1722:Pollution 1688:Teratogen 1619:(BPA, in 1267:Plastics 1238:Colorants 1226:Additives 1010:Chemical 872:(1): 18. 532:figurines 488:Reactive 479:pre-pregs 435:adhesives 343:Duroplast 265:Materials 156:elastomer 121:malleable 110:insoluble 106:infusible 84:radiation 60:thermoset 1703:Diabetes 1609:Monomers 1589:Adipates 1511:plastics 1365:segments 1355:Products 1003:Plastics 539:See also 471:gelcoats 457:, solid 443:castings 439:sealants 396:Thiolyte 329:Bakelite 313:Polyurea 194:Phenolic 129:adhesive 97:hardener 92:catalyst 88:catalyst 1831:Dioxins 1751:Dioxins 1708:Obesity 1449:Cutlery 1439:Bottles 946:3956795 447:potting 431:mortars 357:plywood 347:Trabant 168:polymer 152:plastic 64:polymer 62:, is a 1548:(BBzP) 1517:(PHCs) 1429:Chairs 1397:Nurdle 944:  811:  795:  726:  705:  689:  655:  639:  631:  615:  427:grouts 333:phenol 241:melted 200:, and 160:rubber 148:Curing 125:molded 72:curing 1802:Waste 1648:PBDEs 1559:(DOP) 1185:types 1012:types 574:IUPAC 459:foams 384:Furan 202:furan 198:amino 162:) by 154:, or 80:resin 40:Right 1663:PFCs 1653:PCBs 1629:(in 1593:DEHA 1568:DINP 1563:DIDP 1557:DEHP 1552:DIHP 1536:DIBP 1513:and 1444:Bags 942:PMID 809:ISBN 793:ISBN 724:ISBN 703:ISBN 687:ISBN 653:ISBN 637:ISBN 629:ISBN 613:ISBN 524:jigs 522:and 508:and 331:, a 287:and 108:and 54:, a 35:Left 1631:PVC 1598:DOA 1546:BBP 1541:DBP 960:doi 934:doi 903:doi 899:114 874:doi 843:doi 839:111 777:doi 757:doi 588:doi 586:". 510:BMC 506:SMC 50:In 1874:: 1526:: 940:. 928:. 924:. 897:. 868:. 864:. 837:. 671:. 635:, 576:, 530:, 526:, 477:, 473:, 469:, 461:, 453:, 449:, 445:, 441:, 437:, 421:, 417:, 196:, 139:. 94:, 1633:) 1623:) 1600:) 1591:( 1502:e 1495:t 1488:v 995:e 988:t 981:v 962:: 948:. 936:: 930:3 909:. 905:: 882:. 876:: 870:3 849:. 845:: 779:: 759:: 732:. 675:. 590:: 335:- 325:. 315:/ 158:( 78:( 20:)

Index

Thermosetting

cross linked
materials science
polymer
irreversibly
curing
prepolymer
resin
radiation
catalyst
hardener
cross-linking
infusible
insoluble
malleable
molded
adhesive
thermoplastic
injection molding
Curing
plastic
elastomer
rubber
crosslinking
polymer
vinyl esters
unsaturated monomer
Phenolic
amino

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