1977
DOI: 10.1002/pol.1977.180150402
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Dielectric relaxations in linear aliphatic polyesters

Abstract: Molecular motions in a series of linear aliphatic polyesters [poly(ethylene adipate), poly(ethylene sebacate), poly(hexamethylene sebacate), and poly(decamethylene 1,16‐hexadecanedicarboxylate)] were studied by dielectric measurements. Two loss maxima were observed for each polymer in the temperature range from −196 to about 60°C and in the frequency range from 110 to 105 Hz. The loss maxima of these polyesters, lying between −17 and −38°C at 110 Hz (β‐relaxation), are due to the micro‐Brownian motions of amor… Show more

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Cited by 21 publications
(7 citation statements)
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References 24 publications
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“…The rand ,8-relaxations have been attributed to the local mode motion and micro-Brownian motion, respectively, in the noncrystaiiine region. 4 Present NMR results also support these conclusions, since the T2• component airses from the noncrystalline regions. The value of T2• of the 2-8-MG and 10-16-MG on the high-temperature side of the r-transition are 17 and 27 p,sec, respectively.…”
Section: Temperature Dependence Of Spin-spin Relaxation Timessupporting
confidence: 81%
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“…The rand ,8-relaxations have been attributed to the local mode motion and micro-Brownian motion, respectively, in the noncrystaiiine region. 4 Present NMR results also support these conclusions, since the T2• component airses from the noncrystalline regions. The value of T2• of the 2-8-MG and 10-16-MG on the high-temperature side of the r-transition are 17 and 27 p,sec, respectively.…”
Section: Temperature Dependence Of Spin-spin Relaxation Timessupporting
confidence: 81%
“…Details of the preparation are given in a previous paper. 4 Bulk crystallized samples (MG) were prepared by hot pressing at above their melting temperature and cooled slowly to room temperature in vacuo.…”
Section: Samplesmentioning
confidence: 99%
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“…The lower the values of T g the lower will be the energetic barriers hindering mobility in the amorphous phase. A decrease in T g is affected by [47]:…”
Section: Effect Of Modification On the State Of Amorphous Phasementioning
confidence: 98%