Dielectric properties and AC conductivity studies of novel NR/PVA full-interpenetrating polymer networks

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• 作者：Johns Jobish^a ; ^{jobish_johns@rediffmail.com} ; Nakason Charoen^a ; P. Praveen^b
• 关键词：Dielectric constant ; Natural rubber ; Conductivity ; Interpenetrating polymer network
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2012
• 期刊代码：50_00223093
• 类别：ms
• 出版时间：15 April, 2012
• 卷：358
• 期：8
• 页码：1113-1119
• 文件大小：780 K

摘要

Fully interpenetrating polymer networks (IPN) based on natural rubber (NR) and polyvinyl alcohol (PVA) were prepared by using Glutaraldehyde as the common crosslinking agent. Crosslinking reactions were confirmed by Fourier Transform Infra-red Spectroscopy. The electrical properties of full-IPN have been studied in the frequency range of 10²-10⁶ Hz. The dielectric constant, dielectric loss and ac conductivity were analyzed as a function of frequency, temperature and blend composition. It was found that the dielectric constant and dielectric loss increased with the addition of PVA into NR. Interpenetrated system showed a significant reduction in dielectric constant and dielectric loss and almost frequency independent. The dielectric constant and dielectric loss were increased with increase in temperature. The change in these parameters with temperature in the IPN system was found too low as compared to the pure blends. The ac conductivity study revealed that the IPN materials exhibited a considerable reduction in conductivity.