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http://dx.doi.org/10.7234/kscm.2009.22.3.035

Cross-link Density Measurement and Thermal Oxidative Degradation Analysis of a Carbon Black Compounded EPDM Rubber Hose  

Kwak, Seung-Bum (한양대학교 기계공학과)
Choi, Nak-Sam (한양대학교 기계정보경영공학부)
Kim, Jin-Kuk (국립경상대학교 고분자공학과)
Publication Information
Composites Research / v.22, no.3, 2009 , pp. 35-43 More about this Journal
Abstract
In this study, for a radiator hose made of carbon black filled EPDM(ethylene-propylene diene monomer) rubber, a measuring method of crosslink density was established to analyze the aging behaviors under thermo-oxidative stresses. At $125^{\circ}C$, the crosslink density of the rubber specimens decreased slightly in the initial stage, but increased with increasing the aging time. Such variation in crosslink density was similar to that of tensile strength. This might be due to the formation of sulphoxide crosslinks as well as to additional crosslinks made by the reaction of unvalcunized sulfurs. A high temperature aging of rubber specimens at $180^{\circ}C$ caused a slight increase in crosslink density while it did a large decrease in tensile strength and elongation. With aging at high temperature, the formation of carbonyl groups in EPDM molecule chain and formation of sulphoxide crosslink, rather than the crosslink density variation itself, had a large influence on such changes in mechanical property.
Keywords
cross-link (tensity measurement); thermal oxidative aging; rubber hose; EPDM(ethylene-propylene dine monomer); Mechanical property;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 자동차용 냉각기호스 해설서 RS M0004, 산업자원부 기술표준원， 2001
2 이건주, 배현재, 노사태, 김원택, "Silane 가교 EPOM의 역학적 특성에 관한 연구," 한국고분자학회지, 제11권, 제6호, 1987, pp. 547-556
3 김진국, 이형규, "실리콘/EPOM 고무 블렌드의 제조와 특성에 관한 연구," 한국고분자학회지, 제25권, 제3호, 2001, pp.406-413
4 Cunneen J.I., Russell, R.M., "Occurrence and Preventionof Changes in the αlemical Structure of Natural RubberTire Tread Vulcanizates During Service," Ruhher Chemìstlyand Technology, VoL 43, 1970, pp. 1215   DOI
5 Gent, A.N., "Engineering with Rubbcr," Hanser 2001, pp.13-34
6 F1ory, P.J., "Principles of Polymer Chemistry," Cornell UniversìtyPress, Ithaca, New york, 1969, pp. 576-589
7 Brandrup, J., lmmergut. E.H., Grulke Eric, A., Abe, A., Bloch,D.R., "Polymer Handbook," 4th ed. Wiley. New York, 1999
8 곽승범, 최낙삼, 최윤정, 신세문, "자동차 냉각기 호스용EPOM고무의 노화에 대한 비파괴 특성평가," 한국비파괴검사학회지, 제25권, 제5호, 2005, pp.368-376   과학기술학회마을
9 곽승범, 최낙삼, 강봉성, 신세문, "자동차 냉각기 고무호스용재질에 대한 선뢰성 평가 및 고장메커니즘규명," 자동차공학회논문집, 제13권, 제5호, 2005, pp.152-162
10 Cunneen, J.I., "Oxidative Aging of Natural Rubber,"Ruhber Chemistry and Technology, Vol. 41 , 1968, pp. 182   DOI
11 곽승범, 최낙삼, 신세문, 신외기, "자동차용 냉각기 고무호스의 노화거동과 미소경도분석," 대한기계학회논문집 A권, 제31권, 제9호, 2007, pp.915-923   과학기술학회마을   DOI   ScienceOn
12 Gal, Y.S., "EPOM Rubber and Its Applications," Polymer Science and Technology, Vol. 109, No. 3, 1999, pp.325-333
13 자동차용 냉각기호스 신뢰성평가기준 RS M0004, 산업자원부기술표준원， 2001
14 Palmas, P., Campion, L.L., Bourgeoisat, C.,Martel， L., "ningand Thermal of Elastomers as Studied by H Broadbandand C High-resolution Solid-statε NMR," Polymer, 42, 2001, pp.7675-7683   DOI   ScienceOn
15 Zhao, Q., Li, X., Gao, J., "Surface Degradation of Ethylenepropylene-diene monomer(EPDM) Containing 5-ethylidene-2-norbomene(ENB) as Diene in Artificial eathering Environment," Polymer Degradatiol and Stability, 93, 2008, pp. 692-699   DOI   ScienceOn
16 조현철, "EPDM 새절 기반의 머플러 행거 벚 그 제조 방법."대한민국특허청, 10-2006-0043191, 2006
17 Oarie, R.N., Brebu, M., Vasile, C., Kozlowski, M., "On the Compatibility of the IPP/PA6/EPOM BLends with and without Functionalized IPP I. Thermo-oxidative Behaviour,"Polymer Degradation and Stability, Vol. 80, 2003, pp.551-566   DOI   ScienceOn
18 Flory, P.J., Rehncr, J., "Statistical Mechunics of Cross-Li따dPolymer Networks," Chemical Physis， Vol. 11 , No. 11 ,1943, pp. 512-520
19 Porter, R.S., Macknight W.J., Johnson, J.F., "Víscous and Elastic Behavior Attributed to Polymer Entanglements," Rubber Chemistry and Technology. Vol. 41, 1968, pp.1   DOI