淡江大學機構典藏:Item 987654321/44238
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62805/95882 (66%)
Visitors : 3932108      Online Users : 454
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
    •  Adv. Search
    Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer Goto mobile version


    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/44238


    Title: Influence of side-chain structures on the viscoelasticity and elongation viscosity of polyethylene melts
    Authors: Lin, Gwo-geng;Shih, Hsi-hsin;Chai, Ping-chang;Hsu, Shio-jin
    Contributors: 淡江大學化學工程與材料工程學系
    Date: 2002-11-01
    Issue Date: 2010-03-09 10:05:11 (UTC+8)
    Publisher: Wiley-Blackwell
    Abstract: Metallocene-catalyzed, low-density and linear low-density polyethylenes with similar melt indexes were used to investigate how side-chain structures influence the elongation viscosity and viscoelastic properties. The viscoelastic properties were determined with a rotation rheometer, while the elongation viscosities were acquired by using isothermal fiber spinning. The Phan-Thien-Tanner (PTT) model was also used to understand how the side-chain structure affects the elongation behavior. Experimental results demonstrate that the log G′ vs. log G″ plot can qualitatively describe the effects of the side chain branch on the rheological properties of polyethylene melts. According to the results determined by the PTT model, low-density polyethylene (LDPE) has low elongation viscosities at high strain rates. This low elongation viscosity can be attributed to the fact that LDPE has high shear thinning behavior. The long-chain branching tends to increase entanglements, thereby enhancing the storage modulus, elongation viscosity and shear-thinning behaviors. Uniform side-chain distribution lowers the entanglements, which results in a low storage modulus, elongation viscosity and shear-thinning behavior.
    Relation: Polymer engineering and science 42(11), pp.2213-2221
    DOI: 10.1002/pen.11111
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

    Files in This Item:

    File Description SizeFormat
    0KbUnknown232View/Open
    Lin_et_al-2002-Polymer_Engineering___Science.pdf552KbAdobe PDF1View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback