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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 25, 2011
Accepted July 13, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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초임계 메탄올에서 가교폴리프로필렌과 가교폴리에틸렌의 재활용성 비교

Recycling of Crosslinked Polypropylene and Crosslinked Polyethylene in Supercritical Methanol

이홍식 정주형 홍순만¹ 구종민¹ 조항규¹ 이윤우^†

Hong-shik Lee Ju Hyeong Jeong Soon Man Hong¹ Chong Min Koo¹ Hang-Kyu Cho¹ Youn-Woo Lee^†

서울대학교 화학생물공학부, 151-742 서울 관악구 관악로 1 ¹한국과학기술연구원, 136-791 서울 성북구 화랑로 14길 5

School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea ¹Korea Institute of Science and Technology, 14-gil 5 Hwarang-ro, Seongbuk-gu, Seoul 136-791, Korea

Korean Chemical Engineering Research, February 2012, 50(1), 88-92(5), NONE Epub 2 February 2012

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Abstract

초임계 메탄올에서 가교폴리프로필렌의 탈가교 반응에 대해 연구하고 이를 가교폴리에틸렌의 탈가교 반응과 비교하였다. 회분식 반응기를 이용하여 반응 온도와 초기 겔 함량이 탈가교 반응 속도에 미치는 영향을 알아보았고, 정량적 분석을 위해 반응 전후의 겔 함량을 측정하였다. 반응 온도가 증가할수록, 초기 겔 함량이 증가할수록 탈가교 반응 속도가 증가하였고, 반응 속도는 겔 함량에 선형적으로 의존하였다. 가교폴리프로필렌의 탈가교 반응이 가교폴리에틸렌보다 빠르게 일어나는 것을 확인하였고, 반응속도상수를 계산하여 이를 정량적으로 확인하였다. 이를 통해 재활용 측면에서는 가교폴리프로필렌이 가교폴리에틸렌보다 우수한 것을 알 수 있다.

Decrosslinking of crosslinked polypropylene(XLPP) in supercritical methanol was investigated compared with that of crosslinked polyethylene(XLPE). Effect of reaction temperature and initial gel contents was studied using a batch reactor. Gel contents of samples before and after reaction were measured for quantitative analysis. As reaction temperature and initial gel contents increased, the decrosslinking rate increased. The rate of decrosslinking reaction is dependent linearly on the gel contents. Experimental results indicated that the decrosslinking of XLPP was faster than that of XLPE, and it was confirmed quantitatively by the calculation of kinetic constants. In conclusion, it is considered that XLPP has better recyclability than XLPE.

Keywords

Crosslinked Polypropylene Crosslinked Polyethlene Supercritical Decrosslinking Recycling

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