Long-term weathering behavior of UV-curable clearcoats: Depth profiling of photooxidation, UVA, and HALS distributions

2005 ◽  
Vol 2 (7) ◽  
pp. 529-538 ◽  
Author(s):  
C. M. Seubert ◽  
M. E. Nichols ◽  
A. V. Kucherov
Keyword(s):  
Depth Profiling ◽  
Uv Curable

Eco-friendly castor oil-based UV-curable urethane acrylate zinc oxide nanocomposites: Synthesis and viscoelastic behavior

2019 ◽  
Vol 54 (1) ◽  
pp. 101-110 ◽  
Author(s):  
Abbas Madhi ◽  
Behzad S Hadavand
Keyword(s):  
Zinc Oxide ◽  
Castor Oil ◽  
Zinc Oxide Nanoparticles ◽  
Viscoelastic Behavior ◽  
Environmentally Friendly ◽  
Urethane Acrylate ◽  
Nano Zno ◽  
Uv Curable ◽  
Maximum Value

Attention to environmental problems and the importance of maintaining it have caused the researchers to pay more attention in this regard. The production of polymers and resins has increased in recent years and has affected by environmental pollution due to their long-term degradation. An appropriate solution to this problem is the synthesis of degradable and environmentally friendly polymers and resins. Using natural materials in the synthesis of polymers and resins can help them to be environmentally friendly. The purpose of this research is to synthesize urethane acrylate resins using natural resources. For this purpose, the urethane acrylate pre-polymer was synthesized with castor oil. Then, using modified zinc oxide nanoparticles with 1, 3 and 5 wt% urethane acrylate zinc oxide nanocomposites were produced. The use of castor oil as a degradable part and lack of organic solvent in radiation systems led to the creation of an environmentally friendly resin. Subsequently, the viscoelastic behavior of the prepared nanocomposite was evaluated. Spectrometry results confirm the synthesized resin structure. The morphology of nanocomposites confirmed the proper particle size distribution in a 3 wt.% sample. The results of the dynamic mechanical thermal analysis test showed that increasing the amount of modified nano ZnO could increase the glass transition temperature, and the maximum value was observed in 5 wt.% modified nano ZnO (69.7℃).

High Temperature Reliability Assessment and Degradation Analysis for Diamond Semiconductor Devices

2017 ◽  
Vol 897 ◽  
pp. 743-746 ◽  
Author(s):  
Satoshi Tanimoto ◽  
Tatsuhiro Suzuki ◽  
Sawa Araki ◽  
Toshiharu Makino ◽  
Hiromitsu Kato ◽  
...  
Keyword(s):  
High Temperature ◽  
Series Resistance ◽  
Semiconductor Devices ◽  
Reliability Assessment ◽  
Depth Profiling ◽  
Large Series ◽  
Contact Material ◽  
Degradation Analysis

The long-term reliability of Schottky pn diodes (SPNDs) on diamond having widely used Ti/Pt/Au electrodes was investigated at 500°C in order to identify degradation phenomena at higher temperatures. A vital degradation event was observed after the passage of about 100 hours in that both forward and reverse currents were progressively reduced. AES depth profiling and X-STEM-EELS analyses revealed that this occurred because the Ti contact material changed to insulating (or semiconductive) TiO2, causing large series resistance.

The long-term weathering behavior of UV curable clearcoats

2003 ◽  
Vol 81 (1) ◽  
pp. 103-115 ◽  
Author(s):  
C.M. Seubert ◽  
M.E. Nichols ◽  
V.A. Cooper ◽  
J.L. Gerlock
Keyword(s):  
Uv Curable

scholarly journals Butyronitrile-Based Electrolytes for Fast Charging of Lithium-Ion Batteries

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2869 ◽  
Author(s):  
Peter Hilbig ◽  
Lukas Ibing ◽  
Martin Winter ◽  
Isidora Cekic-Laskovic
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Carbonate ◽  
Solid Electrolyte Interphase ◽  
Depth Profiling ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Fast Charging ◽  
Fluoroethylene Carbonate ◽  
Solvent Additive

After determining the optimum composition of the butyronitrile: ethylene carbonate: fluoroethylene carbonate (BN:EC:FEC) solvent/co-solvent/additive mixture, the resulting electrolyte formulation (1M LiPF6 in BN:EC (9:1) + 3% FEC) was evaluated in terms of ionic conductivity and the electrochemical stability window, as well as galvanostatic cycling performance in NMC/graphite cells. This cell chemistry results in remarkable fast charging, required, for instance, for automotive applications. In addition, a good long-term cycling behavior lasts for 1000 charge/discharge cycles and improved ionic conductivity compared to the benchmark counterpart was achieved. XPS sputter depth profiling analysis proved the beneficial behavior of the tuned BN-based electrolyte on the graphite surface, by confirming the formation of an effective solid electrolyte interphase (SEI).

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