Knowledge (XXG)

Antiozonant

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20: 64: 412: 85:. This reaction breaks the polymer chains, degrading the mechanical properties of the material. The most obvious effect of this is cracking of the elastomer (ozone cracking), which is exacerbated by mechanical stress. The rate of degradation is effected both by the chemical structure of the elastomer and the amount of ozone in the environment. Elastomers which are rich in double bonds, such as 129:
particularly vulnerable, as they contain a high level of unsaturated groups, operate in areas prone to air pollution and are subjected to significant mechanical stresses.
453: 55:. A number of research projects study the application of another type of antiozonants to protect plants as well as salmonids that are affected by the chemicals. 186: 172: 349:"Responses of Zea mays L. cultivars 'Buland' and 'Prakash' to an antiozonant ethylene diurea grown under ambient and elevated levels of ozone" 446: 482: 272: 439: 319: 477: 248: 335: 347:
Singh, Aditya Abha; Chaurasia, Meenakshi; Gupta, Vaishali; Agrawal, Madhoolika; Agrawal, S. B. (May 2018).
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and thus degradation is faster in areas of high air pollution. All of these factors make vehicle
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Hydrocarbon waxes which create a surface barrier, preventing contact with ozone:
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Layer, R. W., & Lattimer, R. P. (1990). Protection of rubber against ozone.
253: 63: 411: 364: 82: 372: 48: 47:. The most important antiozonants are those which prevent degradation of 52: 284:
Hans-Wilhelm Engels et al., "Rubber, 4. Chemicals and Additives" in
81:, which can react with ozone present in the air in process known as 228: 126: 114: 62: 44: 18: 182: 122: 110: 203:
Styrenated phenol (SPH), styrenated and alkylated phenol (SAPH)
427: 121:is naturally present, but it is also a product of 234:(EDU) has been used successfully as antiozonant. 148:The most common antiozonants for elastomers are 163:(PPD) which can be categorized in three types: 101:are the most sensitive to degradation, whereas 286:Ullmann's Encyclopedia of Industrial Chemistry 23:A vehicle tire showing signs of ozone cracking 447: 8: 454: 440: 77:Many elastomers are rich in unsaturated 264: 67:The distribution of atmospheric ozone 7: 408: 406: 173:N,N'-Di-2-butyl-1,4-phenylenediamine 426:. You can help Knowledge (XXG) by 223:For the protection of plants like 14: 336:Antioxidants & Antidegradants 410: 145:to retard the effects of ozone. 273:Rubber Chemistry and Technology 1: 294:10.1002/14356007.a23_365.pub2 288:, 2007, Wiley-VCH, Weinheim. 195:-Phenylenediamines, like DPPD 181:-Phenylenediamines, such as 171:-Phenylenediamines, such as 353:Acta Physiologiae Plantarum 16:Class of chemical compounds 499: 405: 70: 365:10.1007/s11738-018-2666-z 322:December 5, 2008, at the 137:Antiozonants are used as 39:that prevents or retards 249:Stabilizers for polymers 133:Protection of elastomers 199:Other classes include: 483:Organic compound stubs 418:This article about an 397:Review of antiozonants 244:Stabilizer (chemistry) 68: 24: 66: 22: 219:Protection of plants 212:microcrystalline wax 117:are more resistant. 478:Plastics additives 161:-phenylenediamines 143:tire manufacturing 119:Ground-level ozone 69: 25: 435: 434: 275:, 63(3), 426-450. 95:styrene-butadiene 490: 456: 449: 442: 420:organic compound 414: 407: 399:(TheFreeLibrary) 385: 384: 344: 338: 333: 327: 314: 308: 303: 297: 282: 276: 269: 37:organic compound 31:, also known as 498: 497: 493: 492: 491: 489: 488: 487: 463: 462: 461: 460: 403: 393: 388: 346: 345: 341: 334: 330: 324:Wayback Machine 315: 311: 304: 300: 283: 279: 270: 266: 262: 240: 232:Ethylene diurea 221: 135: 107:polychloroprene 75: 61: 59:Effect of ozone 17: 12: 11: 5: 496: 494: 486: 485: 480: 475: 465: 464: 459: 458: 451: 444: 436: 433: 432: 415: 401: 400: 392: 391:External links 389: 387: 386: 339: 328: 326:(product page) 309: 298: 277: 263: 261: 258: 257: 256: 251: 246: 239: 236: 220: 217: 216: 215: 204: 197: 196: 189: 175: 156:′-substituted 134: 131: 99:nitrile rubber 87:natural rubber 73:Ozone cracking 71:Main article: 60: 57: 15: 13: 10: 9: 6: 4: 3: 2: 495: 484: 481: 479: 476: 474: 471: 470: 468: 457: 452: 450: 445: 443: 438: 437: 431: 429: 425: 421: 416: 413: 409: 404: 398: 395: 394: 390: 382: 378: 374: 370: 366: 362: 358: 354: 350: 343: 340: 337: 332: 329: 325: 321: 318: 313: 310: 307: 302: 299: 295: 291: 287: 281: 278: 274: 268: 265: 259: 255: 252: 250: 247: 245: 242: 241: 237: 235: 233: 230: 226: 218: 213: 209: 205: 202: 201: 200: 194: 190: 188: 184: 180: 176: 174: 170: 166: 165: 164: 162: 160: 155: 151: 146: 144: 140: 132: 130: 128: 124: 120: 116: 112: 108: 104: 100: 96: 92: 91:polybutadiene 88: 84: 80: 74: 65: 58: 56: 54: 50: 46: 42: 38: 34: 30: 21: 473:Antioxidants 428:expanding it 417: 402: 356: 352: 342: 331: 312: 301: 285: 280: 267: 225:winter wheat 222: 208:paraffin wax 198: 192: 178: 168: 158: 153: 149: 147: 136: 103:butyl rubber 79:double bonds 76: 33:anti-ozonant 32: 28: 26: 254:Antioxidant 177:Alkyl-aryl 97:rubber and 29:antiozonant 467:Categories 260:References 83:ozonolysis 49:elastomers 43:caused by 373:0137-5881 359:(5): 92. 139:additives 381:13832708 320:Archived 238:See also 167:Dialkyl 35:, is an 191:Diaryl 379:  371:  53:rubber 41:damage 422:is a 377:S2CID 229:maize 127:tires 115:Viton 51:like 45:ozone 424:stub 369:ISSN 317:IPPD 306:6PPP 187:IPPD 183:6PPD 123:smog 113:and 111:EPDM 361:doi 290:doi 227:or 185:or 141:in 27:An 469:: 375:. 367:. 357:40 355:. 351:. 210:, 109:, 105:, 93:, 89:, 455:e 448:t 441:v 430:. 383:. 363:: 296:. 292:: 214:. 193:p 179:p 169:p 159:p 154:N 152:, 150:N

Index


organic compound
damage
ozone
elastomers
rubber

Ozone cracking
double bonds
ozonolysis
natural rubber
polybutadiene
styrene-butadiene
nitrile rubber
butyl rubber
polychloroprene
EPDM
Viton
Ground-level ozone
smog
tires
additives
tire manufacturing
p-phenylenediamines
N,N'-Di-2-butyl-1,4-phenylenediamine
6PPD
IPPD
paraffin wax
microcrystalline wax
winter wheat

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