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Thermomechanical Properties and Shape Memory Effect of Chemically Crosslinked EPDM (Nordel(R) IP)

Title
Thermomechanical Properties and Shape Memory Effect of Chemically Crosslinked EPDM (Nordel(R) IP)
Other Titles
화학적으로 가교된 EPDM (Nordel(R) IP)의 열적기계적 특성 및 형상기억거동
Author
장영욱
Keywords
semicrystalline EPDM(Nordel IP); crosslinking; thermomechanical properties; shape memory behavior
Issue Date
2007-12
Publisher
한국고무학회
Citation
Elastomers and composites, v. 42, No. 4, Page. 217-223
Abstract
결정성을 갖는 에틸렌프로필렌디엔 고무(Nordel(R)IP)를 과산화물로 가교시키고 열적, 기계적특성과 형상기억거동을 조사하였다. 겔함량 측정결과 가교도는 DCP 함량에 따라 증가되었으며, DSC 분석결과 가교된 고무는 결정상이 존재하고 있음을 알 수 있었다. 인장시험 결과 가교도가 증가함에 따라 고무의 모듈러스는 증가되며 파단신율은 감소되었다. 이와 같이 가교 구조 내에 결정상을 함유하는 고무는 우수한 형상기억 특성을 나타내었다. 즉, 이러한 고무는 결정상의 용융온도 이상에서 쉽게 원하는 형태로 변형되고, 변형된 상태에서 냉각시키면 변형된 형태로 잘 고정되었으며, 또한 이렇게 변형된 형상의 시료를 용융온도 이상으로 가열하면 원래의 모양으로 신속히 되돌아오는 것을 관찰할 수 있었다. Thermomechanical and shape memory properties of dicumyl peroxide(DCP) cured semicrystalline EPDM(Nordel(R) IP) were investigated. From gel content analysis, it can be seen that Nordel can be crosslinked by small amount of DCP and the degree of crosslinking increased with the increase of DCP content. DSC analysis revealed that the melting temperature and degree of crystallinity of the crosslinked rubber decreased with the increase of DCP. Tensile test showed that tensile modulus increased and elongation at break of the rubber decreased with an increase in the degree of crosslinking. The chemically crosslinked semi-crystalline EPDM exhibited excellent shape memory behavior, i.e. the sample was easily deformed to have an arbitrary secondary shape above its melting temperature and was fixed well in its deformed state when it is cooled, and then the fixed shape was recovered to its original shape very fast upon heating above its melting temperature.
URI
http://kiss.kstudy.com/thesis/thesis-view.asp?key=2654411https://repository.hanyang.ac.kr/handle/20.500.11754/107451
ISSN
2092-9676; 2288-7725
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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