| Synthesis and Rheological Investigation ofModel Symmetric 3-Arm Star Polyethylene简 |
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| 引用本文： | 唐涛.Synthesis and Rheological Investigation ofModel Symmetric 3-Arm Star Polyethylene简[J].高分子科学,2014,32(1):51-63. |
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| 作者姓名： | 唐涛 |
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| 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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| 关 键 词： | 加氢合成 星形 对称型 变调 流变参数 线性模型 低分子量 丁二烯聚合 |
Synthesis and rheological investigation of model symmetric 3-arm star polyethylene |
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| Feng?Liu,Dong?Wan,Tao?TangEmail author.Synthesis and rheological investigation of model symmetric 3-arm star polyethylene[J].Chinese Journal of Polymer Science,2014,32(1):51-63. |
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| Authors: | Feng?Liu Dong?Wan Email author" target="_blank">Tao?TangEmail author |
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| Institution: | [1]State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Aeademy of Sciences, Changehun 130022, China [2]Graduate School of the （hinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | 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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| Keywords: | Long chain branching Rheology Star polymers Polyethylene Thermorheology |
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