what is the mechanism by which the viscosity of heavy crude is reduced? what type of polymers are used as viscosity reducers? are they commercially available?
I am calculating viscosity of my oil in water emulsion using a rotational viscometer with a disk shaped spindle. The fluid is less viscous upon observation. However when i measured the viscositu,...
04 May 2019 9,821 4 View
I have an oil in water emulsion of which i want to find interfacial tension using a pendant drop tensiometer. what is the correct procedure for the same?
04 May 2019 459 2 View
I have an oil in water emulsion in which more oil is dispersed in less amount of water, the oil is viscous in nature. the emulsion seems stable when kept in tubes while it the same seems unstable...
02 March 2019 3,043 3 View
If an oil in water emulsion made by mixing oil in water using surfactant separates after sometime, then can it be mixed again to form the emulsion? Kindly provide references (if any) along with...
02 March 2019 6,808 1 View
I am working on oil in water emulsion. i wanted to know that if i make a 250 ml emulsion of 60% oil and 40% water containing 1000 ppm surfactant and remove 50 ml from it for stability analysis....
09 October 2018 388 4 View
09 October 2018 4,118 1 View
I want the detailed procedure for SARA analysis, solvents required, apparatus and also detailed procedure on how to perform column chromatography with multiple solvents.
08 September 2018 7,180 4 View
I am working on crude oil and want to conduct SARA analysis which involves sequential elution with multiple solvent systems (4 as per ASTM procedure) i wany to know how to change solvent system in...
08 September 2018 8,943 3 View
I want conducting SARA analysis but i am unable to determine what dia column should i use and how much height od silica bed is required to effectively separate maltenes into 3 components.
08 September 2018 4,801 0 View
I want to add polymeric additive to my sample but i want to add it in ppm level concentrations so i don't know how to draw few microlitres of viscous liquid. i tried with a micropippete but some...
07 August 2018 7,576 0 View
I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...
03 March 2021 7,540 4 View
Anyone can recommend any books on such topics? Thanks in advance.
02 March 2021 8,457 2 View
Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...
02 March 2021 4,910 3 View
Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...
02 March 2021 6,186 3 View
I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...
02 March 2021 1,404 6 View
Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...
28 February 2021 7,882 2 View
I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...
28 February 2021 298 3 View
What could be the reason of moisture at the sides of Vial when I am preparing my polmyer+DMSO solution for membrane fabrication? What etiquettes I am possibly missing here?
28 February 2021 6,516 5 View
I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...
25 February 2021 2,615 3 View
Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...
25 February 2021 8,053 5 View