Dear Hossein,

a rough estimate can be obtained by calculations from Additive group contributions. You will find them in the book of:

 D.W. van Krevelen, Klaas te Nijenhuis (Elsevier, 2009 or earlier issues):

Properties of Polymers: Their Correlation with Chemical Structure; their Numerical Estimation and Prediction from Additive Group Contributions.

As to the answer of Titus, I am of similar opinion, however, try to estimate it and then make a decision.

Best regards, Jiri

I guess there is not really a well fitting model.

General rule, add more hydrophilic groups and polymer will have better compatibility with aqueous phase and will have less effect on surface tension. In this direction ionized groups have a stronger effect than nonionized. I am afraid methyl methacrylate  copolymer will not provide substantial hydrophobicity, i.e. do expect only small effect on surface tension.

Dear Hossein,

a rough estimate can be obtained by calculations from Additive group contributions. You will find them in the book of:

 D.W. van Krevelen, Klaas te Nijenhuis (Elsevier, 2009 or earlier issues):

Properties of Polymers: Their Correlation with Chemical Structure; their Numerical Estimation and Prediction from Additive Group Contributions.

As to the answer of Titus, I am of similar opinion, however, try to estimate it and then make a decision.

Best regards, Jiri

Look if Van Krevelen/te Nijenhuis are debating further on the work of Hoy.

He wrote in Athen conference 1988:

"In our calculation we will assume the amine salts are essentially unionized and the amine salts will be treated as a part of the dissolved polymer.

This assumption reflects the lower dielectric constant of the water cosolvent blend." 

I had this remark in my notes with a discussion (from a colleague); pick up Hoys original article to read more when Krevelen/te Nijenhuis did not discuss this further .

Article K.L. Hoy (Union Carbide):

"Solubility parameter as a design parameter for waterborne polymers and coatings"

Athens Coatings conference book 1988  p161-175

Best regards,

André

PS: when you make such polymers through emulsion polymerization, be aware of the surfactants you may need.. It can be done surfactantless, but then you need to rely on e.g. persulfate for as well making fine seeds and growing them and for the total stabilization. Generally such process take much more process time and are found more often in the academic world. Low MW surfactants are also very mobile... and do have a preference for surfaces.. not only the latex particle surface... and that may have quite some influence on your targeted surface tension.

Dear all,

Thank you very much for your comments and answers..

Dear Dr. Vohlidal,

I have already read this book. I know that surface tension can be calculated from Parachor values of chemical groups. The problem is that no Parachor values are reported for ionic groups. in that book or other polymer handbook, no information are available regarding ionic groups. some information about parachor value of neutral groups just exist. How can i guess parachor value of carboxylate group which has a negative charge?? if i find this, everything will seemingly be dissolved.

It is not clear to me: Are you neutralizing with a fixed base like NaOH or a volatile one (ammonia, amine)? In the latter case you will end up with uncharged species, the carboxylic groups when the volatile neutralizing agent can escape. In that case you do not need the data of the negatively charged COO- .  And are you looking at the final dry stage or are you looking at the wet stage after e.g. application of the material?

Dear Dr. Roelofs

Thank you for your help.  I want to neutralize the ionomer with NaOH. Moreover, I want to use this NaOH-neutralized ionomer in the dry state. In fact, I want to dry and add the obtained polymer into extruder to mix it with other ingredients. 

Ok, that's indeed more difficult....

Maybe you can model it from the low MW species site and try to apply it to your polymers?

This literature on low MW species may be helpful:

http://www.sciencedirect.com/science/article/pii/S0928098700000610

http://www.sciencedirect.com/science/article/pii/S0378517399003749

Check what the references are and who is reffering to these articles, that may be helpful.

Sodium surfactants are maybe close to what you want?

Try this tool. Does it help?

https://pirika.com/NewHP/PirikaE2/Surfactant.html

Why do you inquire about surface tension when you want to use it in dry state?

Dear Andre

Thank you very much for your comments.

Yes I think it works. I should try to guess sodium acrylate parachor value and use it to guess surface tension of the ionomer. I think these articles help me do that

Dear Titus,

I want to blend it with two polymers in melt state.  Do you think it is wrong?

Best regards

in this case I do not think you need to calculate interfacial tension between ionomer and polymers. I would try to match solubility parameter between polymers and ionomer or add a further component to make ionomer compatible with polymers.

When indeed full compatibility is needed Titus's suggestion is the way to go. Still you may question where you may end, as you may also end up at some micellar level, which is small... but not "truly" soluble...   We did such things in water try to make "true" solutions like in organic solvents. When you measure in such cases the rheology by plotting the eta (viscosity) against solids contents in water... you will get often a dispersion like curve and not a true solution one....

Another question: I do not know your application (you do not need to tell if you do not want or are not allowed..) but cannot imagine an application where you would dissolve a sodium hydroxide neutralized polymer in a powder, apart from that you intend to do some post processing in it. like in example 4 from this patent:

http://www.google.nl/patents/US6812269

Their acrylate polymer seems to have a greater contrast than yours (in case you would like to emulsify the other polymer). They did not give numbers in that patent why they use the used polarity balance.

In this case, the type of emulsification is important linked to the residence time, Is there time enough to emulsify what you want?  Inversion type of  emulsification or??? Look at literature of prof Brinks and Salager on several aspects of such processes. http://www.firp.ula.ve/site/en/members/coordinators/1-salager

https://www.google.nl/search?q=Brinks+emulsification&oq=Brinks+emulsification&aqs=chrome..69i57.575j0j7&sourceid=chrome&es_sm=122&ie=UTF-8