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

Feng Liu ^1,2,3 ,
Dong Wan ^1,2,3 ,
Tao Tang ⁴

1.
1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
2.
2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
3.
4.
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received Date: 4 February 2013
Revised Date: 19 April 2013

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.
- Long chain branching,
- Rheology,
- Star polymers,
- Polyethylene,
- Thermorheology
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