Optimization of the thermal mode of polymer substrates during their vacuum metallization

1988 ◽  
Vol 54 (6) ◽  
pp. 693-697
Author(s):  
A. V. Rogachev ◽  
M. V. Bui
Keyword(s):  
Thermal Mode ◽  
Polymer Substrates ◽  
Vacuum Metallization

Research and Modelling on Electrical and Thermal Mode of LEDs Operation in the Luminaire

2018 ◽  
pp. 155-162 ◽  
Author(s):  
Sergei S. Kapitonov ◽  
Anastasia V. Kapitonova ◽  
Sergei Yu. Grigorovich ◽  
Sergei A. Medvedev ◽  
Taher Sobhy
Keyword(s):  
Thermal Conditions ◽  
Operating Mode ◽  
Thermal Processes ◽  
Thermal Mode ◽  
Crystal Temperature ◽  
Premature Failure ◽  
Model Based

In the article, the electrical and thermal processes in the LED lamp with varied parameters are investigated. Voltage and current measurements on all LEDs of the luminaire are carried out in the nominal operating mode. The power allocated to each LED is determined. The calculation of the LED crystal temperature was carried out using the developed thermal LED model based on the results of the measurements and by using “Multisim” program. It has been established that the temperature of the crystals of individual LEDs in the luminaire differ significantly, which leads to unfavourable thermal conditions for them and an increased likelihood of premature failure.

THERMAL MODE OF DRY STEPPE AGRO SYSTEMS IN THE CENTRAL CISCAUCASIA FOR 1961-2017

2019 ◽  
Vol 14 (6) ◽  
pp. 919-928
Author(s):  
Ayvar Aylarov ◽  
◽  
Delyara Tebieva ◽  
Vitaliy Dobronosov ◽  
◽  
...  
Keyword(s):  
Thermal Mode ◽  
Dry Steppe

Modelling of thermal mode for siberian craton by inversion of seismic profiles "Rift" and "Meteorite"

2011 ◽  
Vol 3 (Special Issue) ◽  
pp. 1-7
Author(s):  
A. A. Prokofyev ◽  
O. L. Kuskov ◽  
V. A. Kronrod
Keyword(s):  
Siberian Craton ◽  
Thermal Mode ◽  
Seismic Profiles

scholarly journals 2.45 GHz Patch Antenna Based on Thermoplastic Polymer Substrates

2018 ◽  
Author(s):  
Nurul Hanani Manab ◽  
Elfarizanis Baharudin ◽  
Fauziahanim Che Seman ◽  
Alyani Ismail
Keyword(s):  
Patch Antenna ◽  
Thermoplastic Polymer ◽  
Polymer Substrates

scholarly journals Cell Behavior of Primary Fibroblasts and Osteoblasts on Plasma-Treated Fluorinated Polymer Coated with Honeycomb Polystyrene

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 889
Author(s):  
Klára Fajstavrová ◽  
Silvie Rimpelová ◽  
Dominik Fajstavr ◽  
Václav Švorčík ◽  
Petr Slepička
Keyword(s):  
Chemical Properties ◽  
Plasma Exposure ◽  
Research Teams ◽  
Polymer Substrates ◽  
Substrate Activation ◽  
Physico Chemical ◽  
Polystyrene Solution ◽  
Primary Fibroblasts ◽  
Positive Effect ◽  
Cell Adhesion And Proliferation

The development of new biocompatible polymer substrates is still of interest to many research teams. We aimed to combine a plasma treatment of fluorinated ethylene propylene (FEP) substrate with a technique of improved phase separation. Plasma exposure served for substrate activation and modification of surface properties, such as roughness, chemistry, and wettability. The treated FEP substrate was applied for the growth of a honeycomb-like pattern from polystyrene solution. The properties of the pattern strongly depended on the primary plasma exposure of the FEP substrate. The physico-chemical properties such as changes of the surface chemistry, wettability, and morphology of the prepared pattern were determined. The cell response of primary fibroblasts and osteoblasts was studied on a honeycomb pattern. The prepared honeycomb-like pattern from polystyrene showed an increase in cell viability and a positive effect on cell adhesion and proliferation for both primary fibroblasts and osteoblasts.

Composite proton exchange membranes produced using chitosan and kaolin solvent-free fluid

2020 ◽  
Vol 40 (6) ◽  
pp. 495-506
Author(s):  
Chun-Chun Huang ◽  
Syang-Peng Rwei ◽  
Yun-Shao Huang ◽  
Yao-Chi Shu
Keyword(s):  
Direct Methanol Fuel Cells ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Solvent Free ◽  
Free Fluid ◽  
Exchange Method ◽  
Polymer Substrates ◽  
Practical Applications ◽  
Inorganic Substances ◽  
Electrolyte Membranes

AbstractIn this study, composite membranes produced by combining both biopolymer chitosan (CS) and kaolin solvent-free fluid (kaolin-SF) were used as substitutes for the electrolyte membranes in direct-methanol fuel cells. To improve the interfacial morphologies between organic and inorganic substances, kaolin-SF was prepared using the ion exchange method. Subsequently, kaolin-SF of various doping proportions was mixed with CS crosslinked with sulfuric acid to produce thin membranes. The results of heat exhaustion and scanning electron microscope image analysis indicated that kaolin-SF was successfully doped into the CS polymer substrates, and this addition enhanced the thermal stability and mechanical properties of the CS polymer substrates. As long as the concentration of kaolin-SF was below 5 wt.%, the water absorption rate and proton conductivity of the CS/kaolin-SF composite membranes increased along with the kaolin-SF content. These results indicate that CS/kaolin-SF composite membranes are suitable for practical applications.

Adhesion of photocurable acrylates to solid polymer substrates

1989 ◽  
Vol 38 (11) ◽  
pp. 2037-2055 ◽  
Author(s):  
S. Jönsson ◽  
C. G. Gölander ◽  
A. Biverstedt ◽  
S. Göthe ◽  
P. Stenius
Keyword(s):  
Solid Polymer ◽  
Polymer Substrates

Preparing polymer substrates for bonding

2009 ◽  
Vol 53 (6) ◽  
pp. 22-25
Author(s):  
David Bieniak
Keyword(s):  
Polymer Substrates

scholarly journals Bulk metallic glass coating of polymer substrates

2009 ◽  
Vol 144 ◽  
pp. 012051 ◽  
Author(s):  
Erno Soinila ◽  
Parmanand Sharma ◽  
Markku Heino ◽  
Kaj Pischow ◽  
Akihisa Inoue ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glass Coating ◽  
Polymer Substrates
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