Polymer forces

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Polymer ordering at surfaces

Israelachvili, Fig. 13.13

PEO has an “inverse” water solubility – it becomes less soluble at higher temperatures.

A general principle:

The less soluble the adsorbed polymer – the less stable the dispersion.

MW and temperature effects

Israelachvili, Fig. 14.5

Polystyrene polymers on mica.

(a) End-grafted in toluene, (b) Adsorbed from cyclohexane.

Both solubility and bridging effects are possible in (b)

Polymers at surfaces

Israelacvili, Fig. 14.5
  • (a) In solution
  • (b) End-grafted
  • (c) Adsorbed
  • (d) Adsorbed at low &thetha;
  • (e) Adsorbed at high &thetha;
  • (f) Bridging


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