Properties of Polymer Composites Used in High-Voltage Applications

Pleșa, Ilona; Notingher, P.; Schlögl, Sandra; Sumereder, Christof; Muhr, M.

doi:10.3390/polym8050173

Cited by 276 publications

(192 citation statements)

References 209 publications

(541 reference statements)

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“…From the I-V characteristics of PLA and its nano composites, it is evident that addition of nano aluminium oxide and nano cupric oxide has reduced the resistivity of the neat polymer by 35-45%. The highest dip in the value of resistivity is observed when PLA was doped with 1 mg nano aluminium oxide since nano aluminium oxide is a high-conductivity filler material (Plesa et al 2016). It is noteworthy to observe that the increase in the nano aluminium oxide concentration increased the resistance of the nano composite whereas increase in nano aluminium oxide concentration decreased the resistivity of the nano composite.…”

Section: I-v Characterizationmentioning

confidence: 94%

An Experimental Study on the Thermal Properties and Electrical Properties of Polylactide Doped with Nano Aluminium Oxide and Nano Cupric Oxide

Mujeeb

Lobo²,

Antony

et al. 2017

INAE Lett

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The research on polylactide has been trending over the past 10 years as it is a versatile biopolymer which finds applications in food packaging and medical industries. In this research, nano aluminium oxide and nano cupric oxide have been impregnated into polylactide matrix using sonication and the nano composite thin films were prepared using solution casting technique. The thermal characterization of the neat and doped polymer films were conducted using thermogravimetric analysis and differential scanning calorimetry. the addition of nano aluminium oxide and nano cupric oxide increased the glass transition temperature and melting temperature of the samples in comparison with neat polylactide. Degree of crystallinity of all the doped samples increased with respect to the neat sample except for the sample doped with 1 mg nano aluminium oxide. The I-V characterization of the neat and doped samples revealed that addition of the nano powders reduced the resistivity of PLA by 35-45%. These results recommend the use of polylactide doped with nano aluminium oxide and nano cupric oxide as a potential semiconducting polymeric materials.

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Section: I-v Characterizationmentioning

confidence: 94%

An Experimental Study on the Thermal Properties and Electrical Properties of Polylactide Doped with Nano Aluminium Oxide and Nano Cupric Oxide

Mujeeb

Lobo²,

Antony

et al. 2017

INAE Lett

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“…Spectra are normalized with respect to the band at 2923 cm −1 . In Figure 4b, we zoomed in on the C=O stretching mode of the succinimide moiety in the Diels-Alder adduct [2,3,23] in fpP at 1778 cm −1 as well as c, the out of plane CH-bending mode of the vinylene group of the furyl moiety [14,24] at 855 cm −1 . The crossover point, where, is reached after t x = 670 min and can be attributed to a changing of the viscoelastic properties from a liquid to a solid, i.e., a recovery of the network properties beyond the crossover point.…”

Section: Ft-ir Spectroscopic Analysis Of the De-protection Of Furyl-pmentioning

confidence: 99%

“…In addition, the recent accelerated technologies are seeking for more efficient materials, which have the ability to self-repair inflicted damage. Moreover, several authors have studied cross-linking processes in order to get useful highly cross-linked polymers (CLPs), which used as matrices for structural adhesives [1], foamed structures composites [2], insulators for electronic packaging [3], etc. One can get excellent mechanical properties from these CLPs, for example high modulus, high fracture strength, and solvent resistance.…”

Section: Introductionmentioning

confidence: 99%

Controlled Light Cross-Linking Technique to Prepare Healable Materials

et al. 2017

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Detection of defects, damages and cracks in structural polymers is very difficult, and even if they are detected, they will be very hard to be repaired. This is because different kinds of stress can reduce the mechanical efficiency of structural and functional thermosetting composite materials and they can damage the polymer matrix, thus reducing the purposed properties. General healing processes use thermal energy "alone" to heal these materials, thus impairing the intended properties of the materials. Therefore, we present a thermal healing ability that can be switched-on and/or -off at desire using illumination by photon energy (visible and ultra violet). By this technique, one can control local heal while keeping the efficiency of the material nearly unchanged. Furan-based cross-linker chemically reacts (forward-and reverse-reaction) with short-chains of maleimide-substituted poly(lauryl methacrylate) to form robust chemical bonds. This permits us to perform local control over thermally induced de-and/or re-cross-linking techniques. One can extend and apply this technique to cover micro-devices, coating-techniques, fine lithography, micro-and nano-fabrication processes, etc. Therefore, the present work developed a suitable technology with structural polymeric material, which has the ability to self-heal cracks (and damages) and recover structural function.

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“…Their introduction into insulation system will have an impact in the evolution of acceptance criteria. This conclusion is provided by this recent review [63]. Authors have thoroughly examined the polymers properties and their evolution when nanocomposites are included.…”

Section: Nanocomposites An Answer To the Lifespan Extension?mentioning

confidence: 88%

The Insulation for Machines Having a High Lifespan Expectancy, Design, Tests and Acceptance Criteria Issues

Barré¹,

Napame²

2017

Machines

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Abstract:The windings insulation of electrical machines will remain a topic that is updated frequently. The criteria severity requested by the electrical machine applications increases continuously. Manufacturers and designers are always confronted with new requirements or new criteria with enhanced performances. The most problematic requirements that will be investigated here are the extremely long lifespan coupled to critical operating conditions (overload, supply grid instabilities, and critical operating environments). Increasing lifespan does not have a considerable benefit because the purchasing price of usual machines has to be compared to the purchasing price and maintenance price of long lifespan machines. A machine having a 40-year lifespan will cost more than twice the usual price of a 20-year lifetime machine. Systems which need a long lifetime are systems which are crucial for a country, and those for which outage costs are exorbitant. Nuclear power stations are such systems. It is certain that the used technologies have evolved since the first nuclear power plant, but they cannot evolve as quickly as in other sectors of activities. No-one wants to use an immature technology in such power plants. Even if the electrical machines have exceeded 100 years of age, their improvements are linked to a patient and continuous work. Nowadays, the windings insulation systems have a well-established structure, especially high voltage windings. Unfortunately, a high life span is not only linked to this result. Several manufacturers' improvements induced by many years of experiment have led to the writing of standards that help the customers and the manufacturers to regularly enhance the insulation specifications or qualifications. Hence, in this publication, the authors will give a step by step exhaustive review of one insulation layout and will take time to give a detailed report on the standards that are linked to insulation systems. No standard can provide insurance about lifespan, nor do any insulation tests incorporate all of the operating conditions: thermal, mechanical, moisture and chemical. Even if one manufacturer uses the standards compliance to demonstrate the quality of its realization; in the end, the successful use in operation remains an objective test. Thereafter, both customer and manufacturers will use the standards while knowing that such documents cannot fully satisfy their wishes. In one 20-year historical review, the authors will highlight the duration in insulation improvements and small breakthroughs in standards writing. High lifespan machines are not the main interest of standards. A large part of this publication is dedicated to the improvements of the insulation wall to achieve the lifespan. Even if the choice of raw materials is fundamental, the understanding of ageing phenomena also leads to improvements.

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Properties of Polymer Composites Used in High-Voltage Applications

Cited by 276 publications

References 209 publications

An Experimental Study on the Thermal Properties and Electrical Properties of Polylactide Doped with Nano Aluminium Oxide and Nano Cupric Oxide

An Experimental Study on the Thermal Properties and Electrical Properties of Polylactide Doped with Nano Aluminium Oxide and Nano Cupric Oxide

Controlled Light Cross-Linking Technique to Prepare Healable Materials

The Insulation for Machines Having a High Lifespan Expectancy, Design, Tests and Acceptance Criteria Issues

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