Ernest Ong

3 Questions 18 Answers 0 Followers

Questions related from Ernest Ong

Why the pH of xanthan gum in aqueous solution is 7 (neutral) when it has glucuronic and pyruvic acids in its chemical structure?

I find it pretty confusing since xanthan gum has both glucuronic and pyruvic acids in its chemical structure, it should release H+ ions upon solvation in an aqueous solution and make it acidic.

19 January 2018 9,312 2 View

Does Carreau model provide qualitatively good estimation of relaxation time?

I am calculating the relaxation time of a concentrated polymer solution. Based on my steady shear measurement, I used curve fitting that is based on Carreau model to obtain an estimated relaxation...

31 August 2017 2,981 4 View

Intrinsic viscosity measurement with Malvern Kinexus Pro+ rheometer

Since I do not have a Ubbelohde capillary viscometer, I wish to know whether it is possible for me to measure intrinsic viscosity of a dilute polymer solution with a Malvern Kinexus Pro+...

28 July 2017 4,369 3 View