Effect of molecular weight on the synergistic interaction of xanthan/galactomannan

Makoto Takemasa*, Reika Matsuda, Katsuyoshi Nishinari, Rheo Takahashi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Effect of molar mass of two polysaccharides, xanthan and galactomannan on the synergistic interaction of them was investigated by dynamic shear modulus and differential scanning calorimetry (DSC). Totally 8 samples were prepared. All the combinations of three xanthan whose molar mass is ranging from 2.5×105 to 7.5×106 and five galactomannan (locust bean gum) ranging from 2.8×103 to 5.8×10 5 were measured. The transition temperatures decreases with decreasing molar mass of locust bean gum, but are almost independent on that of xanthan. For the lowest molar mass locust bean gum, no DSC peak and no large increase of shear modulus were found, indicating no synergistic interaction. These effects were discussed based on the commonly accepted model of the crosslinking mechanism for this system, the binding site of the locust bean gum is consecutive unsubstituted mannose backbone.

Original languageEnglish
Title of host publicationPolymer Preprints, Japan
Number of pages1
Publication statusPublished - 2005
Externally publishedYes
Event54th SPSJ Annual Meeting 2005 - Yokohama
Duration: 2005 May 252005 May 27


Other54th SPSJ Annual Meeting 2005


  • DSC
  • Galactomannan
  • Molecular weight
  • Rheology
  • Synergistic interaction
  • Xanthan

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'Effect of molecular weight on the synergistic interaction of xanthan/galactomannan'. Together they form a unique fingerprint.

Cite this