I do not understand how can I have a concentration of 0.36molPVP K30/L EG if the molecular weight (Mw) of PVP is about 40.000, therefore I would need too many PVP to get to that concentration. Could anybody tell me if it is ok to have all that PVP or I am doing it wrong. Thank you.
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Molarity in this case may concerns the monomere of your polymer. So, you have to calculate the mass of vinylpyrrolidone and convert it to molarity.
Better to use PVP with a certain concentration in terms of weight %. Generally 0.1-1% PVP solution is used for nanoparticle growth.
Molarity in this case may concerns the monomere of your polymer. So, you have to calculate the mass of vinylpyrrolidone and convert it to molarity.
Thank you very much Mourad, I was quite confused because the a PVP (long chain) can be also considered as a molecule, therefore I can make a solution of that molecule.
yes, such things are very confusing.
Especially, for many polymers it is not possible to obtain molar masses precisely. That's why it is really better to use weight% or w/v% as units for giving polymer amounts in a solution.
as the polymers have average molecular weights instead of absolute molecular weight, it is advisable to employ %wt (g/dl) i.e, wt of polymer to the solvent (thermodynamically good) being used to prepare polymer concentrations.
Calculate the mass of vinylpyrrolidone (111.14 gm) for preparing molar solution. Average MW of PVP determine your desirable polymer chain length. If you want to use PVP as a matrix to form a gel with, you have to use larger chains. OR If you want to use it as a capping agent ; then smaller PVP molecules should be selected so that they are less likely to bind the multiple particles and coat the particle one by one.
Good question and good explanations, I was about to post the same issue. thank to everyone! Cheers!
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