While numerous studies indicate that grafting can enhance polymer solubility, it remains unclear to me how solubility affects the grafting process. Is there any relationship between solubility and grafting ratio?
Solubility has some affects on the polymerization and thus the grafting. First off before starting a polymerization reaction or its grafting onto another polymer, you should do some solubility tests to find out which solvents solve your monomers. Hence, as you go on your reaction and stirring under right conditions, as the monomers add and add forming long chains like 20, 30, 40 monomers, the solvent's solubility will decrease in which the most polymer chemists do is precipitation to be able to yield the polymer and get rid of the non-bound monomers. While doing so, the issue of grafts hanging as pendant groups from the functional groups of your each monomer on your total polymer will have intrinsic effect on the solubility. SO the condition of a solubility of a monomer and a grafted polymers may vary in that sense. Therefore, the best grafting ratio can be found by finding the best solvent for your long polymer + your graft group. So 2 effects come into play here. You should find such a solvent where it will have affinity towards both your graft group and your polymer. That's why do some solubility tests towards both of them and you'll see the grating ratio will be getting affected.
Polymer grafting is a technique to improve the morphology, chemical, and physical properties of the polymer. This technique has the potential to improve the existing conduction and properties of polymers other than charge transport; as a result, it enhances the solubility.
grafting to different polymers with various molecular weights and formating a long chain let's say polymeric blend might increase the solubility but not in every solvent and all conditions for water we could say the solubility increases with the increase of the grafting and there is more place for the polymers to swell water content
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