Ultrasonic and dielectric studies of seg
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C. Delides; R.A. Pethrick
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Article
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1981
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Elsevier Science
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English
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Ultrasonic and dielectric relaxation measurements are reported as a function of frequency and temperature for a series of segmented ester polyurethanes. Glass transitions for the ester block were determined using a combination of differential scanning calorimetry and dilatometry. The activation ener