نتایج جستجو برای: cyclic olefin polymer
تعداد نتایج: 192668 فیلتر نتایج به سال:
Traditional systems for olefin/paraffin separation, like low-temperature distillation, are expensive and very energy consuming, and therefore, alternative separation methods are desired. Facilitated transport membranes are new tools for this separation to be substituted in large scale separation of olefin-paraffin mixtures. To design a membrane process for olefin-paraffin separation, equilibriu...
In this paper, we introduce autonomous gel actuators driven by chemical energy. The polymer gels prepared here have cyclic chemical reaction networks. With a cyclic reaction, the polymer gels generate periodical motion. The periodic motion of the gel is produced by the chemical energy of the oscillatory Belouzov-Zhabotinsky (BZ) reaction. We have succeeded in making synthetic polymer gel move a...
There is a need for low-cost and easily accessible optical devices THz applications. can be manufactured rapidly with 3D printing while using transparent materials. In this work, we optimized the parameters high-resolution of filament, cyclic olefin copolymer (TOPAS), in order to print high quality pipe waveguides. We used nozzles diameters between 0.15 mm 0.80 wide range temperatures speeds. s...
Highly transparent conductive polycrystalline Ga-doped ZnO (GZO) films with a thickness of about 100nm prepared on cyclo-olefin polymer (COP) or glass substrates at various temperatures below 90°C by ion plating with DC-arc discharge were investigated. A systematic study has been made of the influence of substrate temperature Ts on the structural, electrical, optical and residual stress propert...
The straightforward functionalization of sterically demanding α,α-disubstituted double bonds β-pinene, (-)-limonene and terpenoids has been achieved via cross metathesis with internal olefins. reactions are catalyzed by second generation ruthenium catalysts in dimethyl carbonate as green solvent or under neat conditions. This transformation provides a clean process for the access to functionali...
In this paper, we studied the electronic conductance of a polypyrrole polymer, which is embedded between two semi-infinite simple chains by using Green’s function technique in tight-binding approach. We first reduced the center polymer to a one dimensional chain with renormalized onsite and hopping energies by renormalization method. Then, we calculated the system conductivity as a function of ...
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