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Cooperative hydration in solutions of temperature-responsive polymers

Cooperative hydration in solutions of temperature-responsive polymers [Pg.200]

In contrast to PEO, other water-soluble polymers, such as poly(Al-isopropylacrylamide) (PNIPAM), show very flat LCST, whose cloud-point lines and spinodal lines are horizontal up to 20 wt% of polymer concentration and almost independent of the molecular weight [49-54]. The phase separation region takes a shape like the bottom part of a square, so that in what follows we refer to it as the miscibility square. Obviously, the miscibility square cannot be explained by random adsorption of water molecules. But, [Pg.200]

The coupled equations (6.81) and (6.82) should be solved for x and y to find the cluster distribution function in terms of the polymer volume fraction and the temperature. Upon eliminating x, the second equation is transformed to [Pg.202]

The total number of free water molecules and associated complex is given by [Pg.202]

For random hydration, /f(j) should be replaced by Km = -Vmln)nCm All results reduce to random hydration, as studied in the previous section. [Pg.203]




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Cooperative hydration

Hydration polymer solutions

Hydration solutions

Hydration, of polymer

Polymer hydration

Polymer temperature

Polymers in solutions

Responsive polymer solutions

Responsive polymers

Solute temperature

Solutions of polymers

Temperature hydration

Temperature of Solution

Temperature response

Temperature solutions

Temperature-responsive polymer

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