Synthesis and Rheological Investigation of Model Symmetric 3-Arm Star Polyethylene

Feng Liu Dong Wan Tao Tang

Citation:  Feng Liu, Dong Wan, Tao Tang. Synthesis and Rheological Investigation of Model Symmetric 3-Arm Star Polyethylene[J]. Chinese Journal of Polymer Science, 2014, 32(1): 51-63. doi: 10.1007/s10118-014-1370-8 shu

Synthesis and Rheological Investigation of Model Symmetric 3-Arm Star Polyethylene

摘要: A variety of linear and 3-arm star polyethylene (PE) model polymers covering a wide range of molecular weight are synthesized by the living polymerization of butadiene and the subsequent hydrogenation. Several rheological parameters of these model linear and 3-arm star PE samples are analyzed for detecting the long chain branching (LCB) structure. It is found that the analyses based on zero shear viscosity, vGP plot and flow activation energy are very sensitive to the 3-arm star PEs. The information on the presence of LCB can be obtained with these methods even for low molecular weight samples, which can not be determined by GPC-MALLS. However the information about the LCB structure can not be obtained by the rheological methods alone.

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  • 发布日期:  2014-01-05
  • 收稿日期:  2013-02-04
  • 修回日期:  2013-04-19
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