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).
243:
472:
211:
396:
376:
157:
142:
138:
125:
and thus degradation is faster in areas of high air pollution. All of these factors make vehicle
118:
305:
368:
94:
423:
419:
360:
289:
36:
323:
231:
106:
98:
86:
72:
40:
466:
348:
90:
380:
19:
224:
207:
102:
78:
293:
316:
206:
Hydrocarbon waxes which create a surface barrier, preventing contact with ozone:
271:
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
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.