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The effect of dye sorption on electromechanical properties in sodium poly(L-glutamate)

✍ Scribed by Ando, Yutaka ;Kawabata, Naruto ;Nishida, Kenzo

Book ID
105334874
Publisher
Wiley (John Wiley & Sons)
Year
1983
Tongue
English
Weight
307 KB
Volume
21
Category
Article
ISSN
0098-1273

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✦ Synopsis

Abstract

Piezoelectric constant, Young's elastic modulus, and dielectric constant of undyed and dyed films of poly(L‐glutamate) were measured at 10 H~z~ over the temperature range βˆ’120 to 120Β°C. The temperature of the maximum in βˆ’dβ€³~14~ shifts toward higher temperature up to 0.6 mg/g polymer of dye uptake and then shifts toward lower temperature by further dye sorption. The variation of the piezoelectric modulus was interpreted by the change of mobility of impurity ions in the sample.

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Solid state nmr methods were applied to the study of the motions and structural heterogeneity in polyglycine, sodium poly (L-glutamate) , and poly (L-alanine ) . The response of both the main-chain and side-chain resonances to the addition of water was studied using static and magic-angle sample-spi