Microelectronic and microprocessor technology, communication devices, control systems, information processing and transmission, as well as generating a voltage pulse device (currents) and electromagnetic fields (EMF) special forms and ATP and low-current low-voltage converter equipment are shielded from the effects of external PEMI using metal shells of rectangular, cylindrical, spherical and other geometric shapes [3-7].
This attenuation of external PEMI through the use of a metal screen corresponding geometric and electrical parameters is sufficient for reliable operation in the standard mode of virtually any of the protected equipment from the above mentioned contact technology.
The use of GD is one of the most common methods of equipment protection from the influence of their work interference (the induced) of voltages and currents, caused by exposure to these external PEMI and secure environment equipment service [3, 15, 25].
In practice, while ensuring effective protection of EPO from the harmful effect of external PEMI applied the concept of the band to protect their equipment and therefore a holistic approach in the use of memory, providing for the installation in different zones of the protected EPO and equipment simultaneously the three types of grounding [3, 15, 26, 27].
The structures of EPDM and PEMI V with the highest oil absorptivity were indicated by IR spectra, as shown in Fig.
The TGA curve of PEMI before oil absorption and after oil absorption is shown in Fig.
The microstructure of crossing section of PEMI V before oil absorption and after oil absorption is shown in Fig.
The oil absorbencies of PEMI increased with increasing immersion time and reached a plateau after 47 days immersion in diesel oil.
Obvio usly, the conversion from PE amic acid into PEMI is not absolutely necessary to obtain the desired adhesion, and might even cause discoloration or degradation reactions or undesired crosslinking reactions during heating in the melt.
Gel Percentages of PEMA and PEMI Samples and Effect on Rheology of PEMI Samples.
Three-layered films were prepared using HDPE film and polyethylene terephthalate (PET) film as the outer layers and the PEMAs and PEMIs as the inner layer.
Depending on the reactivity of the pendent amine groups of the PEMIs, these groups can 1) react with the ester functionalities of the polyester forming an amide linkage between the PEMA and the PET layers, 2) form hydrogen bonds with the carbonyl functionalities of the ester units or 3) form polar interactions with the carbon atoms of the ester functionalities.