observations on viscosity reduction of phpa polymer for south korea market

observations on viscosity reduction of phpa polymer for south korea market
Tags: , , , ,
  • How does polymer concentration affect the behavior of PHPA fluids?
  • Recall that PHPA fluids are solutions of synthetic polymers not clay suspensions and thus they can be expected to display different behavior. As regards the effect of polymer concentration, it can be seen from Fig. 6 that as the concentration increases, the values of both moduli also increase.
  • Does partially hydrolyzed polyacrylamide lose viscosity?
  • It is found that there is a significant loss of viscosity when partially hydrolyzed polyacrylamide (PHPA) fluids are circulated through a centrifugal pump in a loop system. This behavior is quite distinct from that of bentonite slurries which require high shear mixing and recirculation to ensure good hydration.
  • How rheological properties affect the stability of polymer fluids?
  • The rheological properties of polymer fluids may also influence the fluid loss from an excavation and hence its stability.
  • Should a rheometer be used for limiting viscosity of polymer fluids?
  • When evaluated over a much wider shear-rate range with a cone-and-plate rheometer, the polymer fluids show signs of approaching limiting viscosities at the very low and high shear rates, and for this behavior the Carreau model is more appropriate.