Responsive and Adaptive Materials

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Last updated 10:28 PM on 5/8/26
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4 Terms

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LCST

(Lower Critical Solution Temperature): polymer soluble below this temperature, above the LCST phase, separation, collapse of the chain.

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UCST

(Upper Critical Solution Temperature): polymer soluble above this temperature, below the UCST phase separation, collapse.

3
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Controlling the UCST, LCST with molecular weight.

larger chains, less soluble due to lower (relative) translational entropy

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The Interaction parameter x

characterizes the interaction energy between the polymer and the solvent, and it consists of both enthalpic and entropic contributions: X =X_h + X_s

<p>characterizes the interaction energy between the polymer and the solvent, and it consists of both enthalpic and entropic contributions: X =X_h + X_s</p>