Hi, I don't where to post this but perhaps you all can help. I have two polymer solutions, one with a viscosity of 4000 cps and one with viscosity 100 cps. I would like to mix the two to obtain a solution that is ~400 cps. The solutions are identical except that the lower viscosity one has more added monomer. Is it just simply a matter of calculating the volume ratio needed to bring down the viscosity (eg. 92% of 100 cps added to 8% 4000 cps)
, or is it more complicated than that?

It is a lot more complicated than an arithmetic mean. Your polymer solutions may not be ideal newtonian fluids. See the attached link for more information.

http://www.herc.com/aqualon/product_data/aq_bro_cmc_prps_sol.html

Nice link refrig guy. Is the equation in you link possibly the same one behind this online viscosity blending calculator?

EDIT: Just ran some two viscosity blending calculations with the formula from the article and with the online blending calculator link. It appears they are the same.

This message has been edited. Last edited by: TallPaul,

You can make the required viscosity solution(400cps),by mixing 57.80% of the lower component solution(100cps) with 42.20% of the higher component solution(4000cps).This is calculated by using a vdw chart.

Regards,
Menon

quote:

Originally posted by KRISHNAKUMAR MENON:
You can make the required viscosity solution(400cps),by mixing 57.80% of the lower component solution(100cps) with 42.20% of the higher component solution(4000cps).This is calculated by using a vdw chart.

Regards,
Menon

Is the vdw chart available on line? Using the viscosity blending calculator I posted above gives 62.5% to 37.5%.

Please mail to me in the below address for the vdw chart

Regards,
Menon

nnkrishnakumar_menon@rediffmail.com

Hi folks, thanks for the info. I actually figured out on my own, through trial and error, that I needed to mix ~40% of the higher viscosity stuff to reach my desired blend.