Role of pumice particles in the thermal, electrical and mechanical properties of poly(vinyl alcohol)/poly(vinyl pyrrolidone) composites

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• 作者：Manammel Thankappan Ramesan ; Ankita George…
• 关键词：Poly(vinyl alcohol) ; Poly(vinyl pyrrolidone) ; Blends ; Pumice ; X ; ray diffraction ; Glass transition temperature ; Thermal stability ; Electrical conductivity
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：126
• 期：2
• 页码：511-519
• 全文大小：1,430 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943
• 卷排序：126

文摘

Poly(vinyl alcohol)/poly(vinyl pyrrolidone)/pumice composites were prepared with various loadings of pumice particles by a simple and environmental friendly solution blending. The influence of pumice particles in the blend was examined by different characterization techniques like FTIR, UV, XRD, SEM, DSC, TG and conductivity measurements. FTIR and UV spectra indicated the nature of pumice particle interaction with the blend matrix. XRD patterns revealed that amorphous nature of the blend decreases due to the interaction of pumice particles with the blend segments. SEM images showed the uniform dispersion of filler in the polymer matrix, and the dispersion of pumice decreased with increase in pumice content. Analysis of the DSC studies showed a significant decrease in glass transition temperature with an increase in mass percentage of pumice. Thermal decomposition temperature of the composite was gradually increased with the increase in concentration of pumice particles. The mechanical and electrical properties such as tensile strength, AC electrical conductivity, dielectric constant and dielectric loss of the composite were higher than pure blend, and these properties increased with the increase in dosage of pumice particles, whereas the elongation at break of the composite decreases with the addition of pumice particles.