Study of the effect of modification with small additives of phenylenediamines

The studies of the mechanical electrophysical properties of polymers and their modifications under the simultaneous influence of electrical discharges and mechanical force are presented. The paper presents the results of the experimental studies of the electrophysical and mechanical strength, the temperature dependence of the tangent of the dielectric loss angle, the specific volume electrical resistance and the relative deformation at break of new film polymer materials obtained on the basis of high-pressure polyethylene (LDPE) with a mixture of phenylenediamine additives OPD and PhI. The content of additives varied in the range of (0.03-0.5) wt%. The established increase in the electrophysical characteristics (increase in resistance to high electric field) of the LDPE film with the introduction of 0.1 wt% of chemical additives of PhI and with subsequent three-fold orientation extraction can be associated with a decrease in the concentration of charge carriers and their mobility, as well as an increase in the degree of crystallinity and packing density of polymer chains, which makes it difficult for ionization processes to occur at a given high electric field strength. It is shown that a decrease in the electrophysical characteristics of the studied polymer materials in the presence of tensile mechanical forces leads to the accumulation of bulk charges in them and the formation of submicrocracks.

Smart-Glass Glazing using Arduino and Android Application

<p>The parts of buildings most susceptible to light and heat are the windows, which are necessary for basic cooling and heating. A huge amount of electrical energy is used to power air conditioners to adjust the inside temperature of residential buildings, while appropriate glazing techniques and materials can be used to reduce energy consumption. There are classic techniques used for tinting glass in buildings and cars, but they all continue to use fixed techniques with one degree of glazing. Users cannot adjust the glazing of these glasses in response to the intensity of sunlight either automatically or by hand. In this research, a modern technique is proposed to allow users to automatically control a glass’s glazing through sensors and Android application with a microcontroller. Arduino microcontroller is used along with a special film polymer dispersed liquid crystals (PDLC) material coating the glasses to enable tinting. The results show adjustable levels of tinting with PDLC film being enabled.</p>

Local Orientation of Chains at Crystal/Amorphous Interfaces Buried in Isotactic Polypropylene Thin Films

A better understanding of the aggregation states of polymer chains in thin films is of pivotal importance for developing thin film polymer devices in addition to its inherent scientific interest....

Dynamic stabilisation during the drainage of thin film polymer solutions

The drainage and rupture of polymer solutions was investigated using a dynamic thin film balance. The polymeric nature of the dissolved molecules leads to significant resistance to the deformation of...

Binary non-fullerene-based polymer solar cells with a 430 nm thick active layer showing 15.39% efficiency and 73.38% fill factor

High hole mobility polymer and Y-series non-fullerene acceptor boost efficiency and fill factor of thick-film polymer solar cells.