Characterization and intermolecular interactions of hydroxypropyl guar solutions.

  title={Characterization and intermolecular interactions of hydroxypropyl guar solutions.},
  author={Yu Cheng and Kirk M. Brown and Robert K. Prud'homme},
  volume={3 3},
Aqueous solutions of guar galactomannan and hydroxypropyl guars (HPG) with different molar substitution (MS) levels were studied using dilute solution viscometry and gel permeation chromatography. When guar is modified to HPG, the added hydroxypropyl groups sterically block the hydrogen bonding sites on the guar backbone and reduce the hydrogen bonding attractions between guar molecules. The effects of molar substitution on the intermolecular interactions are inferred from measurements of the… CONTINUE READING