In the theory of electric strength, usually referred to as free-volume theory, breakdown is initiated by free electrons accelerated by electric field in the largest of the holes present in the amorphous phase of all polymers. In contrast to previous publications, the breakdown is treated as the...
Cite this entry (2007). Electric strength. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-0-387-30160-0_4214 Download citation .RIS .ENW .BIB DOIhttps://doi.org/10.1007/978-0-387-30160-0_4214 Publisher NameSpringer, ...
The electric strength of polythene has been measured using impulse voltages of differing rise times. The mean value of electric strength increases from 5·6 MV cm1 for a voltage rise time of 60 μs to 6·6 mV cm1 when the voltage rise time is 80 μs. The dc strength is 6·4 mV cm...
THERE has recently been a considerable amount of discussion and speculation 1 as to the possible effects on a polymer from polymerization in a relatively strong electric field. The possibility of using this technique to yield polymers which would have unusual physical and/or electrical properties has...
19, No.8, 1987 Reversing-Pulse Electric Birefringence of [Glu(OBzl)]. ments, a reversing-pulse generator with a time constant of0.5 ps each for the buildup, reverse, and decay portion was used in the low field strength region (£:::;6kVcm- 1). A quarter- wave plate was inserted ...
Effects of additives on gel-spinning of ultra-high molecular weight polyethylene As judged from the fibre tensile strength-extrudate draw speed relationship for UHMWPE solutions in paraffin oil, carbon black particles diminish flow instabilities and extrudate irregularities as does EPDM rubber. Reductions ...
Transient Electric Birefringence of Segmentally Flexible Macromolecules in Electric Fields of Arbitrary Strength We study in this work the decay of the electric birefringence from the steady-state value to zero when an orienting electric field applied on a macromolecu... FG Díaz,B Carrasco,MC Lópe...
Lee C, Wei X, Kysar JW, Hone J (2008) Measurement of the elastic properties and intrinsic strength of monolayer graphene. Science 321:385–388 Article CAS Google Scholar Xing T, Li LH, Hou L et al (2013) Disorder in ball-milled graphite revealed by Raman spectroscopy. Carbon 57:515–...
A chemical structure that facilitates ionization and that can stabilize these charges, such as a π-conjugated system, is expected to increase the charge density compared with that of conventional insulating polymers. Here, we report a mechanoelectric generator (MEG) (vibrational energy harvester) ...
The experimental results show that the electric field (which does not affect the structural changes of the material) affects the diffusion rate of liquid media in polymers, thus being one of the important factors influencing the strength of polymers used in liquid media....