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Alpha relaxation study in poly(vinyl chloride)/poly(ethyl methacrylate) blends using thermally stimulated currents

✍ Scribed by T Fahmy; M T Ahmed

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
153 KB
Volume
49
Category
Article
ISSN
0959-8103

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✦ Synopsis

Thermoelectrets of poly(vinyl chloride) (PVC) and poly(ethyl methacrylate) (PEMA) blends were prepared using the conventional thermal poling method. a-Relaxation in this polyblend was investigated using thermally stimulated depolarization currents (TSDC). The global spectra of the polyblends revealed that the two polymers are not completely compatible. An Eyring relationship was veri®ed through the linear relation between the activation enthalpy DH and the activation entropy DS. In addition, the thermal sampling (TS) data were used to determine the compensation parameters such as compensation temperature T c and compensation time (t c ). These parameters were used to calculate the density of disorder (DOD) for all samples, which was found to be close to 32%.

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Use of Thermally Stimulated Discharge Current for the Study of Rotational Mobility of 4-Mercaptoacetamidodiphenylamine in Poly(vinyl chloride)
✍ Mahrous, Salah 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 281 KB 👁 1 views

Thermally stimulated depolarization current (TSDC) of PVC containing 4-mercaptoacetamidodiphenylamine was studied. The current peak height (arelaxation peak), maximum temperature, and activation energies were found to be influenced by the additive. The results suggest that no internal plasticization