Orientation effects in polyethylene terephthalate caused by high pressure and their influence on dielectric relaxation properties

Fainshtein, Ye.B.; Kazaryan, L.G.; Igonin, L.A.

doi:10.1016/0032-3950(70)90062-6

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2001

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“…46–48 An increase of pressure reduces free volume and, therefore, strongly affects the α‐peak,11, 12 diminishing the peak and shifting it to higher temperature 49. 50…”

Section: Resultsmentioning

confidence: 99%

Dielectric relaxation spectroscopy of poly(ethylene terephthalate)

Pratt

Smith

2001

Polymer International

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Contour maps of dielectric loss tangent within the ranges 0.1 Hz to 3 MHz and −175 °C to +190 °C are presented for a commercial poly(ethylene terephthalate) (PET) in two initial states of crystallinity. Individual absorption regions resemble those for poly(butylene terephthalate) and are attributed to carbonyl‐driven α‐ and β‐relaxation processes and to Maxwell–Wagner–Sillars polarizations. Possible causes are considered for the asymmetry and structure apparent in the α‐peak of partially crystalline PET. © 2001 Society of Chemical Industry

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“…46–48 An increase of pressure reduces free volume and, therefore, strongly affects the α‐peak,11, 12 diminishing the peak and shifting it to higher temperature 49. 50…”

Section: Resultsmentioning

confidence: 99%