Calculating viscosity of a mixed polymer blend.

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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?

4/11/057:18 AM

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refrigguyMember

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

4/12/056:33 AM

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tallpaulMember

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.

4/12/059:41 AM

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nnkmenonMember

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

4/12/059:27 PM

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tallpaulMember

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%.

4/13/054:34 AM

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nnkmenonMember

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

Regards,
Menon

nnkrishnakumar_menon@rediffmail.com

4/14/053:51 AM

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vraoMember

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.

4/18/058:46 AM

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tbokichMember

Hi
I was wondering if someone could give me a hand. I mix two molding silicones to produce my required viscosity. It is mixed with 60% of A and 40% of B. A is Viscosity (Pa.s/20°C) 220 and be is 14 Can you tell me what my mixed viscosity is
Thanks

5/4/0911:52 PM

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