Abstract
The effect of sample size on the results of solvent extraction measurements for detecting cocontinuity in polymer blends was investigated. Poly(ethylene oxide)/polystyrene (PEO/PS) blend samples of several thicknesses were analyzed by removing the PEO phase using water extraction. The experimental degree of continuity was shown to have a linear dependence on the reciprocal of sample thickness. A model is proposed to explain this dependence and to allow the bulk or true degree of continuity to be determined. Measurement of the bulk degree of continuity is useful for understanding properties of cocontinuous polymer blends such as electrical conductivity, impact strength, or tensile strength.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 423-428 |
| Number of pages | 6 |
| Journal | Polymer |
| Volume | 45 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 15 2004 |
Bibliographical note
Funding Information:This work was supported by the RTP Company and by the MRSEC Program of the National Science Foundation under Award Number DMR-0212302. We would like to thank Steve Hahn of Dow Chemical for supplying the polystyrene.
Keywords
- Cocontinuous morphology
- Polymer blends
- Solvent extraction
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