Kinetics of polymerization and properties of polymeric thin films generated from macroscopically oriented liquid crystalline monomers

1994 ◽  
Author(s):  
Charles E. Hoyle ◽  
Joe B. Whitehead, Jr. ◽  
E. Brister ◽  
Tsuyoshi Watanabe
Keyword(s):  
Thin Films ◽  
Liquid Crystalline ◽  
Kinetics Of Polymerization ◽  
Polymeric Thin Films ◽  
Kinetics Of

Polymerization Kinetics of Methacrylic Groups in Organic-Inorganic Hybrid Polymeric Thin Films

2007 ◽  
Vol 1007 ◽  
Author(s):  
Congji Zha ◽  
Xinshi Luo ◽  
Barry Luther-Davies
Keyword(s):  
Thin Films ◽  
Thermal Treatment ◽  
Spectroscopic Technique ◽  
Polymerization Kinetics ◽  
Polymerization Process ◽  
Thermal Curing ◽  
Polymeric Thin Films ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Kinetics Of

ABSTRACTIn this paper, the polymerization kinetics of unsaturated double bonds (C=C) in TiO2- and ZrO2-doped hybrid polymeric thin films during UV irradiation and thermal curing is studied by monitoring the variation of C=C absorption band at 1630 cm-1 using FT-IR spectroscopic technique. Experimental results showed that polymerization of the unsaturated C=C groups in the TiO2- and ZrO2-doped hybrid polymers can be realized by either photo-irradiation or thermal treatment. The UV-induced polymerization process is much faster than thermal curing, but a full conversion of C=C groups into polyacrylate chains cannot be achieved without thermal treatment. The catalytic effect of TiO2 and ZrO2 on promoting the polymerization of C=C groups was observed, and the time of UV exposure and thermal curing for cross-linking C=C bonds was found to decrease with the increase of the concentration of TiO2 and ZrO2. The activation energy of the hybrid material containing varied concentration of TiO2 and ZrO2 was calculated, and the results indicated that TiO2 is more active than ZrO2 in promoting the polymerization of the unsaturated C=C bonds. Finally, the mechanisms for TiO2 and ZrO2 enhancing the material's photosensitivity (i.e. promoting polymerization of C=C bonds) have been proposed and discussed.

Polarized Fluorescence of Spin-coated Polymeric Thin Films

2007 ◽  
Vol 2 (2) ◽  
pp. 257-264
Author(s):  
Satoko Nishiyama ◽  
Masahiro Tajima ◽  
Yasuhiko Yoshida
Keyword(s):  
Thin Films ◽  
Polarized Fluorescence ◽  
Polymeric Thin Films

Carbon Monoxide Sensing Technologies

2021 ◽  
Keyword(s):  
Thin Films ◽  
Carbon Nanotubes ◽  
Carbon Monoxide ◽  
Metal Oxides ◽  
Electrochemical Sensors ◽  
Colorimetric Detection ◽  
Infrared Sensors ◽  
Polymeric Thin Films ◽  
Semiconducting Metal Oxides ◽  
Book Covers

The book covers the sensing and monitoring of poisonous carbon monoxide pollution in the environment. The sensors covered include semiconducting metal oxides, carbon nanotubes, conducting polymeric thin films, sensors based on colorimetric detection, non-dispersive infrared sensors, electrochemical sensors and photoacoustic detectors.

Inhomogeneous Broadening of Photoluminescence Spectra and Kinetics of Nanometer-Thick (Phenethylammonium)2PbI4 Perovskite Thin Films: Implications for Optoelectronics

2021 ◽  
Author(s):  
Vladimir S. Chirvony ◽  
Isaac Suárez ◽  
Jesús Rodríguez-Romero ◽  
Rubén Vázquez-Cárdenas ◽  
Jesus Sanchez-Diaz ◽  
...  
Keyword(s):  
Thin Films ◽  
Inhomogeneous Broadening ◽  
Photoluminescence Spectra ◽  
Kinetics Of

Designing Chemically Selective Liquid Crystalline Materials that Respond to Oxidizing Gases

2021 ◽  
Author(s):  
Nanqi Bao ◽  
Jake Gold ◽  
Tibor Szilvasi ◽  
Huaizhe Yu ◽  
Robert Twieg ◽  
...  
Keyword(s):  
Computational Methods ◽  
First Principles ◽  
Liquid Crystalline ◽  
Soft Materials ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials ◽  
Chemically Selective ◽  
Kinetics Of

Computational methods can provide first-principles insights into the thermochemistry and kinetics of reactions at interfaces, but this capability has not been widely leveraged to design soft materials that respond selectively...

Fast oxygen exchange kinetics of pore-free Bi1−xSrxFeO3−δ thin films

2011 ◽  
Vol 13 (37) ◽  
pp. 16530 ◽  
Author(s):  
Anja Wedig ◽  
Rotraut Merkle ◽  
Benjamin Stuhlhofer ◽  
Hanns-Ulrich Habermeier ◽  
Joachim Maier ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Exchange ◽  
Exchange Kinetics ◽  
Kinetics Of

Investigation of electrodeposition kinetics of In, Sb, and Zn for advanced designing of InSb and ZnSb thin films

2020 ◽  
pp. 114967
Author(s):  
Dominika Rajska ◽  
Agnieszka Brzózka ◽  
Katarzyna E. Hnida-Gut ◽  
Grzegorz D. Sulka
Keyword(s):  
Thin Films ◽  
Kinetics Of
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