Fig. 4. (A) Young's modulus E versus concentration (by weight %) of plasticizer (dioctyl phthalate). E is computed from the wrinkling pattern (solid black symbols) by means of Eqs. 2 and 3. Data from other techniques (12) are shown for comparison. (B) Thickness h versus plasticizer concentration. h is computed from Eqs. 2 and 3; compare with data from x-ray reflectivity measurements (7). The error bars are the standard errors of the measurements. [View Larger Version of this Image (69K JPEG file)]

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