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Dynamic mechanical properties of Eucommia ulmoides gum with different degree of cross-linking

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Abstract

The dynamic mechanical properties of Eucommia ulmoides (EU) gum with different degree of cross-linking are studied systematically in this article. EU gum displays five dynamic mechanical behaviors with increasing degree of cross-linking. Before elastic critical turning point, EU gum shows two active dynamic mechanical temperature zones with rising of temperature, one is T g zone, controlled by glass transition mechanism, the other is T m zone, controlled by crystalline melting mechanism, its tan δ values at T g zone and T m zone during the process of cross-linking obey the dynamic reverse transition law: at the T g zone, the peak value of its tan δ is proportional to cross-linking degree inversely proportional to crystallinity degree; at T m zone, its tan δ value is proportional to crystallinity degree and inversely proportional to cross-linking degree. In addition, the T g, T m, and X c of the EU gum with different degrees of cross-linking are obtained as well.

Graphical Abstract

In terms of temperature, the tan δ ~ T curve of EU gum has two active dynamic mechanical temperature zones. One is T g zone controlled by glass transition mechanism; the other is T m zone controlled by crystalline melting mechanism. In terms of cross-linking degree, the tan δ ~ T curve of EU gum displays five dynamic mechanical models.

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Acknowledgment

This research was supported by grants from the early pre-research of the major basic special research of the Ministry of Science of China (Grant No. 2002CCA03600).

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Authors and Affiliations

  1. The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China

    Sarina, Jichuan Zhang & Liqun Zhang

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  1. Sarina
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  2. Jichuan Zhang
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  3. Liqun Zhang
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Correspondence to Jichuan Zhang.

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Sarina, Zhang, J. & Zhang, L. Dynamic mechanical properties of Eucommia ulmoides gum with different degree of cross-linking. Polym. Bull. 68, 2021–2032 (2012). https://doi.org/10.1007/s00289-012-0712-3

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  • DOI: https://doi.org/10.1007/s00289-012-0712-3

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