[논문]Physical and Rheological Properties of Thermoplasticized Crosslinked-Polyethylene Foam in Supercritical Methanol

Cho, Hang-Kyu; Hong, Soon-Man; Baek, Kyung-Yeol; Koo, Chong-Min; Lee, Hong-Shik; Lee, Youn-Woo

doi:10.1007/bf03218641

[국내논문] Physical and Rheological Properties of Thermoplasticized Crosslinked-Polyethylene Foam in Supercritical Methanol 원문보기

Macromolecular research, v.17 no.12, 2009년, pp.950 - 955

Cho, Hang-Kyu (Hybrid Materials Research Center, Korea Institute of Science and Technology (KIST)) , Hong, Soon-Man (Hybrid Materials Research Center, Korea Institute of Science and Technology (KIST)) , Baek, Kyung-Yeol (Hybrid Materials Research Center, Korea Institute of Science and Technology (KIST)) , Koo, Chong-Min (Hybrid Materials Research Center, Korea Institute of Science and Technology (KIST)) , Lee, Hong-Shik (School of Chemical and Biological Engineering & Institute of Chemical Processes, Seoul National University) , Lee, Youn-Woo (School of Chemical and Biological Engineering & Institute of Chemical Processes, Seoul National University)

Abstract ▼ AI-Helper

The physical and rheological properties of thermoplasticized irradiation-crosslinked polyethylene foam using supercritical methanol treatment were investigated by GPC, FTIR, DSC, WAXS, DMTA and UDS. The polyethylene foam was selectively decrosslinked into thermoplasticized polyethylene in an appropriate supercritical methanol condition without any undesirable side reactions such as oxidation and disproportionation. The thermoplasticization was promoted with increasing reaction temperature to reach completion above $380^{\circ}C$. The supercritical reaction condition affected the crystallization behavior, and mechanical and rheological properties of the decrosslinked polyethylene foam, but not its crystallographic structure or crystallinity.

Keyword

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

가설 설정

All DSC data were listed in Table I. In Figure 4(a), the treated XLPEs had higher crystallization temperature than XLPE. Partially or fully decrosslinked XLPE may have higher degree of freedom in chain mobility than XLPE because of lower gel fraction.

제안 방법

In this article, a sufficient amount of supercritically decrosslinked polyethylene foam was obtained by using scale- up version 500 mL reactor of previous experiment for the physical and rheological tests. Physical and rheological properties of the decrosslinked polyethylene foams using supercritical methanol have been investigated in detail.
DMTA (dynamic mechanical thermal analyzer) tests were performed by using TA Instrument DMTA Q800 to evaluate solid mechanical property. Rheological measurements were performed by Physica UDS 200 in the oscillatory mode with 25 mm parallel plates from 140 to 220 ℃ under nitrogen atmosphere. All data were obtained in the linear regime.

대상 데이터

It could be understood in terms of gel fraction and molecular weight of the decrosslinked. The decrosslinked XLPE studied in the work was a semicrystalline polymer which had about 50% ciystalline portion and 50% amorphous portion in spite of different crosslinking density. The amorphow polyethylene is well known to have very low beta or gamma glass transition less than -100 ℃.

성능/효과

From these results, it could be concluded that decrosslinking reaction of XLPE was promoted with reaction temperature and completed above 380 ℃ without any side reaction in the supercritical methanol. In addition, XLPE was apt to be fairly selectively decomposed at the crosslink points, not at random sites in the supercritical condition.

참고문헌 (17)

Y. Arai, T. Sako, and Y. Takebayashi, in Supercritical fluids molecular interactions, physical properties, and new applications, Springer, Heidelberg, 2002
Y. Nagase, M. Yamagata, and R. Fukuzato, R&D Kobe Steel Engine. Report, 47, 43 (1997)
H. Tagaya, Y. Shibasaki, C. Kato, J. Kadokawa, and B. Hatano, J. Mater. Cycles Waste Manag., 6, 1 (2004)

상세보기
M. Genta, T. Iwaya, M. Sasaki, M. Goto, and T. Hirose, Ind. Eng. Chem. Res., 44, 3894 (2005)

상세보기
M. Goto, M. Sasaki, and T. Hirose, J. Mater. Sci., 41, 1509 (2006)

상세보기
T. Goto and Y. Yamazaki, Hitachi Cable Review, 23, 24 (2004)
T. Goto, T. Yamazaki, T. Sugeta, I. Okajima, and T. Sako, J. Appl. Polym. Sci., 109, 144 (2008)

상세보기
S. Watanabe, K. Komura, S. Nagaya, H. Morita, T. Nakamoto, S. Hirai, and F. Aida, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials, June, Nagoya, 2003
A. Kamimura, K. Yamada, T. Kuratani, Y. Taguchi, and F. Tomonaga, Chem. Lett., 35, 586 (2006)

상세보기
H. S. Lee, J. H. Jeong, H. K. Cho, C. M. Koo, S. M. Hong, H. Kim, and Y. W. Lee, Polym. Degrad. Stabil., 93, 2084 (2008)

상세보기
J. Brandrup and E. H. Immergut, in Polymer Handbook, 3rd ed., Wiley, New York, 1989
M. Yamaguchi and K. Suzuki, J. Polym. Sci. Part B: Polym. Phys., 39, 2159 (2001)

상세보기
R. P. Charoff and R. Maxwell, Polym. Eng. Sci., 8, 159 (1969)
J. E. Guillet, R. L. Combs, D. F. Slonaker, D. A. Weemes, and D. W. Groover, J. Appl. Polym. Sci., 8, 757 (1965)
E. R. Harrellm and N. Nakajima, J. Appl. Polym. Sci., 29, 995 (1984)

상세보기
W. E. Rochefort, G. C. Smith, H. Rachapudy, V. R. Raju, and W. W. Grassely, J. Polym. Sci. Polym. Phys. Ed., 17, 1197 (1979)

상세보기
R. B. Bird, R. C. Armstrong, and O. Hassager, in Dynamics of Polymeric Liquids, 2nd ed., Wiley-Interscience, New York, 1987

저자의 다른 논문 :

활용도 분석정보

상세보기

다운로드

내보내기

활용도 Top5 논문

해당 논문의 주제분야에서 활용도가 높은 상위 5개 콘텐츠를 보여줍니다.
더보기 버튼을 클릭하시면 더 많은 관련자료를 살펴볼 수 있습니다.

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증