Study of the thermal relaxation effects in polymers by a conjugated use of thermally stimulated depolarization and polarization current methods

Vanderschueren, J.; Niézette, J.; Yianakopoulos, G.; Thielen, A.

doi:10.1016/0040-6031(91)87168-v

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Relaxation Phenomena In Polymers1

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“…Dipolar relaxation in amorphous [240,241], semi-crystalline [241] and liquid crystals [242] were investigated by the TSDC method, and the effects of polarisation and space charging were analysed for different systems [243][244][245]. Both TSDC and TSPC methods were applied to polymers [246]. Appropriate modelling of the depolarisation effects on the TSDC measurements is very important for better understanding of polymer properties [247].…”

Section: Relaxation Phenomena In Polymersmentioning

confidence: 99%

TSDC spectroscopy of relaxational and interfacial phenomena

Gun'ko

Zarko

Goncharuk

et al. 2007

Advances in Colloid and Interface Science

134

167

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Section: Relaxation Phenomena In Polymersmentioning

confidence: 99%

TSDC spectroscopy of relaxational and interfacial phenomena

Gun'ko

Zarko

Goncharuk

et al. 2007

Advances in Colloid and Interface Science

134

167

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Thermally stimulated depolarization currents in poly (ethyleneterephthalate‐ran‐p‐hydroxybenzoates)

D’Souza

2001

Polymer Engineering & Sci

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Thermally stimulated polarization (TSPC) and depolarization currents (TSDC) are measured on polyethylene terephthalate (PET) copolymerized with p‐hydroxy benzoic acid (PHB). These systems are important since they comprise components of many commercial polymer liquid crystals (PLCs). There has been some speculation about the origins of the multiple transition peaks in TSDC of PLCs and secondary peaks have frequently been designated as resulting from Maxwell‐Wagner interphase polarization. The applicability of this designation for main chain PLCs has been investigated. TSDC as a function of field strength and window polarization has been conducted and the transitions have been identified as glass transition peaks as opposed to space charge relaxations. A comparison of the TSDC current versus the polarization current (TSPC) reveals that TSPC is not generated for transitions associated with the PHB component.

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