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Effects of End-Groups on Properties of Hyperbranched Polyether

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Abstract:

In order to investigate influence of end-groups on thermodynamic property and viscosity of hyperbranched polyether. Three series of hyperbranched polyethers with three different end-groups were studied. These three groups are: hydroxyl, acetate and stearic acid ester. The result confirms the complicated effect of end-groups on properties of hyperbranched polymer. When end-groups change from polar groups of hydroxyl to non-polar groups of acetate, glass transition temperature reduced about 50°C, viscosity reduced sharply too. Glass transition temperature and viscosity all increase with generation rise. When end-groups change from acetate to stearic acid ester, corresponding hyperbranched polyether change from amorphous to crystalline. The crystallization stemmed from long chain structure of end-group, which is easy to form crystalline, its crystalline region molten become main thermodynamic transformation, and obscure the glass transition.

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Periodical:

Advanced Materials Research (Volumes 488-489)

Pages:

137-141

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.488-489.137

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Online since:

March 2012

Authors:

Xue Jing Song, Yun Jun Luo

Keywords:

DSC, End-Groups, Hyperbranched Polyether, Thermodynamic Properties, Viscosity

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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