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Rheological properties of concentrated solutions of agarose in ionic liquid
Author(s) -
Horinaka Junichi,
Yasuda Ryosuke,
Takigawa Toshikazu
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34972
Subject(s) - agarose , rheology , ionic liquid , polymer , materials science , modulus , solvent , ionic bonding , elastic modulus , polymer chemistry , chemistry , chromatography , composite material , organic chemistry , ion , catalysis
The rheological properties of agarose solutions were examined under the effect of entanglement coupling between agarose chains. Agarose solutions were prepared by using an ionic liquid 1‐butyl‐3‐methylimidazolium chloride as a solvent. The concentration of agarose was varied from 1.1 × 10 1 –2.1 × 10 2 kg m −3 . The master curves of the angular frequency (ω) dependence of the storage modulus ( G ′) and the loss modulus ( G ″) showed a rubbery region in the middle ω region and a flow region at low ω region, respectively. The molecular weight between entanglements ( M e ) for agarose was calculated from the plateau modulus. Moreover, M e for agarose melt was determined to be 2.3 × 10 3 from the concentration dependence curve of M e . By using well‐known empirical relations in polymer rheology, information on molecular characteristics of sample agarose was derived. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012