Association energy in strongly associative polymers

The association energy E a, one of the most important parameters of associative polymers, is related to a ratio of two timescales: the attempt time τ 0 that controls the Rouse-type motion and the sticker lifetime τ s that controls the sticker dissociation. For sulfonated polystyrene slightly above t...

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Bibliographic Details
Published in:Journal of rheology (New York : 1978) 2017-11, Vol.61 (6), p.1199-1207
Main Authors: Zhang, Zhijie, Huang, Chongwen, Weiss, R. A., Chen, Quan
Format: Article
Language:English
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Summary:The association energy E a, one of the most important parameters of associative polymers, is related to a ratio of two timescales: the attempt time τ 0 that controls the Rouse-type motion and the sticker lifetime τ s that controls the sticker dissociation. For sulfonated polystyrene slightly above the gel point, the moduli contributed from the Rouse-type motion and sticker dissociation are sufficiently but not strongly separated over the timescale, and thus, the temperature dependences of τ 0 and τ s can be resolved separately from analyzing the high and low frequency moduli obtained from the frequency sweep measurements. A ratio of the temperature dependences enables us to determine E a that is consistent with E a determined directly from the value of τ s/τ 0 at given T.
ISSN:0148-6055
1520-8516
DOI:10.1122/1.4997586