Dielectric Polymer Nanocomposites by J. Keith Nelson (auth.), J. Keith Nelson (eds.)

By J. Keith Nelson (auth.), J. Keith Nelson (eds.)

Dielectric Polymer Nanocomposites presents the 1st in-depth dialogue of nano-dielectrics, an rising and fast-paced subject in electric insulation. The ebook offers an summary of the heritage, ideas and promise of nanodielectrics, in addition to a dialogue of the processing of nanocomposites. specific concerns also are given to clay dependent procedures, mechanical, thermal and electrical homes and floor houses, in addition to erosion resistance. Carbon nanotubes are mentioned as a way of construction of nonlinear conductivity. Editor J. Keith Nelson brings jointly the prime minds within the box, whose contributions to the ebook also:

  • Discusses the heritage, ideas and value of nano-dielectric composites
  • Includes whole insurance of nanodielectric composites corresponding to cryogenic purposes, excessive voltage rigidity grading fabrics and purposes within the capacitor industry
  • Provides unique insurance at the processing of nanocomposites

Dielectric Polymer Nanocomposites is ideal for lecturers and researchers operating in or attracted to studying extra approximately this transforming into box.

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Demonstrated that intercalative polymerization of ©-caprolactam could be realized without modifying the MMT surface. Indeed, this monomer was able to directly intercalate the MMT in water in the presence of hydrochloric acid. 200ıC/, with excess of ©-caprolactam, the clay so modified can be swollen again and the polymerization occurs as soon as the temperature is raised to 260ı C. The in situ polymerization method has also been used for NC manufactured with different kinds of thermoplastic polymer matrices, such as polyolefins (PP, PE, EVA) (Sun and Garces 2002; Bergman et al.

It consists of the dispersion of an organically modified nanofiller in the epoxy resin before the addition of the hardener and the curing procedure. The preparation scheme for the direct mixing method, used to obtain microcomposites and nanocomposites, is depicted in Fig. 10. As can be seen, in order to disaggregate the nanofiller clusters and to obtain a good dispersion and distribution in the polymer matrix an elevated shear force must be applied in the mixing process. It has been reported in the literature that this preparation method provides nanocomposites with improved electrical performance and with a thermal expansion coefficient very close to that of the conventional filled epoxy (Imai et al.

14 shows a case where polyethylene and its nanocomposites exhibit a power law relationship (approximate linear plot on a log-log scale), but there is a marked difference in the case of a conventional (micro) composite which shows a behavior typical of interfacial polarization (Raju 2003). It would appear that the build up of internal charge at the internal interfaces is mitigated in the case of nanomaterials which is consistent with the space charge studies highlighted in Sect. 2. It is also possible to use transit time methods to estimate the carrier mobility (Many and Rakavy 1962) as discussed in Sect.

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