Citation: Xue-pei Miao, Yan-shuang Guo, Li-fan He, Yan Meng, Xiao-yu Li. Rheological Behaviors of a Series of Hyperbranched Polyethers[J]. Chinese Journal of Polymer Science, ;2015, 33(11): 1574-1585. doi: 10.1007/s10118-015-1707-y shu

Rheological Behaviors of a Series of Hyperbranched Polyethers

Xue-pei Miao ¹ ,
Yan-shuang Guo ² ,
Li-fan He ^3,4,5 ,
Yan Meng ^3,4,5 ,
Xiao-yu Li ^3,4,5

1.
Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
2.
TA Instruments-Waters LLC (Beijing), 9/F, Tongniu International Manson, Beijing 100026, China
3.
1. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
4.
2. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
5.

Received Date: 18 April 2015
Revised Date: 30 June 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 51173012) and The Fundamental Research Funds for the Central Universities at Beijing University of Chemical Technology.

Hyperbranched polyethers with different structures and molecular weights (MW) were synthesized using the A2+B3 approach by varying monomer ratio, A2 structure, and reaction time. Effects of backbone structure and MW on melt rheological behaviors were investigated by both small amplitude oscillatory shear and steady shear measurements. Master curves were constructed using the time-temperature superposition principle and compared. In the reduced frequency range covered, lgG~lg(aT) always show a slope of 1.0, suggesting a terminal zone behavior; in contrast, unexpected step changes or plateaus are observed on lgG' master curves. Effects of backbone structure and MW on master curves were discussed. The Cox-Merz rule was tested at different temperatures and was found to be applicable when flow instability was absent.
- Hyperbranched polyethers,
- Rheology,
- Time-temperature superpositio
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