Antwort: [RASMB] densitometer

[wendel.wohlleben at basf.com]

Hi Eray,

welcome to the polymer-XLI-community :-)

PAA has     v-bar = 0,650 ml/g      and dn/dc = 0,140 ml/g

We have good experience with Anton Paar densitometer DMA5000 and use it
routinely for densities of polymers in solution and as dispersed latex
particles. With a 4-point dilution series you get the density with
four-digit accuracy.


Beste Grüße, Wendel


Dr. Wendel Wohlleben
Polymer Physics


Phone: +49 621 60-95339, E-Mail: wendel.wohlleben at basf.com
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Ludwigshafen, Germany


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             "Eray Dalgakiran"                                             
             <eraydalgakiran at g                                             
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                                        [RASMB] densitometer               
             20.02.2007 09:43                                              
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




Hi!

We have recently purchased a ProteomeLab XL-I analytical ultracentrifuge.
We are dealing with synthetic polymers, proteins, biopolymers, and
complexes of protein-polymer molecules.

So far, I understand that we have to know partial specific volume of solute
material to make calculations. We now want to buy a densitometer in order
to measure partial specific volumes. Can anyone recommend me a good
densitometer (company, model etc.)?

And is there anyone knows the v-bar value of PAA (Polyacrylic acid)?

Many thanks...



Eray Dalgakiran

Department of Bioengineering
Yildiz Technical University

www.bioeng.yildiz.edu.tr _______________________________________________
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