期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 120, 期 4, 页码 2090-2094出版社
WILEY
DOI: 10.1002/app.33386
关键词
decrosslinking; supercritical methanol; polyethylene; crystallization; rheology
资金
- Hybrid Materials Research Center of the Korea Institute of Science and Technology (KIST)
- 21C Frontier R and D Program
- Industrial Waste Recycling R and D Center of the Ministry of Science and Technology of the Republic of Korea
- Eco-technopia21 program
- Industrial Waste Recycling R & D Center of Ministry of Science and Technology, South Korea
- Ministry of Knowledge Economy, Republic of Korea
- MOST
- POSCO
The crystallization, and mechanical and rheological properties of decrosslinked-crosslinked-high-density polyethylenes using supercritical methanol were investigated by DSC, WAXS, DMTA, and UDS. Crosslinked high-density polyethylenes were successfully decrosslinked in a supercritical methanol condition. The residual gel content of the decrosslinked samples decreased with the reaction temperature. The crystallization behavior, mechanical, and rheological properties of the decrosslinked samples were influenced considerably by the gel content. As the gel content increased, the network gel structure restricted the chain mobility of polymer molecules in the melt state and hindered their crystallization. Thus, the nonterminal yield behavior in the melt state was enhanced and the crystallinity decreased. The dynamic elastic modulus of the decrosslinked sample in solid state increased with the increase in the crystallinity. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 2090-2094, 2011
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