Synthesis of AC60-Para-Xylylene Copolymer

1992 ◽  
Vol 247 ◽  
Author(s):  
Douglas A. Loy ◽  
Roger A. Assink
Keyword(s):  
Free Radical ◽  
Room Temperature ◽  
Chemical Properties ◽  
Gravimetric Analysis ◽  
Physical And Chemical Properties ◽  
Thermal Gravimetric ◽  
Green Solution ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Brown Powder

ABSTRACTThe preparation and purification of macroscopic quantities of buckminsterfullerenes [1] or buckyballs has ignited an explosion of research into their physical and chemical properties, and a variety of strategies for preparing new fullerene-based materials. Free radical synthesis is an appealing approach for forming polymeric fullerene materials. We report a polymeric fullerene material prepared by reacting pure C60 with xylylene from the thermolysis of paracyclophane. Addition of xylylene to a purple solution of C60 in toluene solution at -78 °C resulted in an olive-green solution from which an insoluble brown powder precipitated upon warming to room temperature. Analyses of the powder by solid state 13C MAS NMR, IR, and thermal gravimetric analysis are consistent with C60-xylylene copolymer.

scholarly journals Polyurethane green composites for the treatment of boron present in the oil produced water

2020 ◽  
Author(s):  
Murtuza Ali Syed ◽  
Mohammed Al Sawafi ◽  
Feroz Shaik
Keyword(s):  
Produced Water ◽  
Chemical Properties ◽  
Gravimetric Analysis ◽  
Physical And Chemical Properties ◽  
Thermal Gravimetric ◽  
Boron Removal ◽  
Weight Losses ◽  
Chemical Solutions ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Polyurethane (PU) based algae biocomposite is synthesized and tested for boron removal from oil produced water. The percentage of algae is varied in the biocomposite and its physical and chemical properties are evaluated. The surface morphology, crystalline structure, thermal stability is characterized using scanning electron microscope, fourier transform infrared spectroscopy and thermal gravimetric analysis. The density of synthesized PU/algae composites is in the range of 1.12 and 1.20 g/ml based on content of filler in the PU matrix. Weight losses of the tested specimens in various chemical solutions are less than 10%. The boron removal efficiency is in the range of 84–85%, depending upon the algae filler at pH 7.19.

Physical and Chemical Properties of Silicon Dioxide Film Deposited by New Process

1987 ◽  
Vol 105 ◽  
Author(s):  
Takuji Goda ◽  
Hirotsugu Nagayama ◽  
Akihiro Hishinuma ◽  
Hideo Kawahara
Keyword(s):  
Silicon Dioxide ◽  
Room Temperature ◽  
Etching Rate ◽  
Chemical Properties ◽  
Industrial Area ◽  
Physical And Chemical Properties ◽  
Silicon Dioxide Film ◽  
Wide Range ◽  
Physical And Chemical ◽  
And Chemical Properties

AbstractA new coating process of silicon dioxide (SiO2) “LPD” process, has been developed recently. Silicon dioxide (SiO2) film can be deposited on any substrate at the room temperature by immersing in hexafluorosilicic acid (H2SiF6).In this study, physical and chemical properties of the “LPD- SiO2” film were investigated by using XPS, IR, ellipsometry, and etch rate measurement. The properties of this film deposited at the room temperature were almost the same as those of plasma CVD. The “LPD-SiO2” film without annealing was contained traces of F and OH. However, by annealing, F and OH were rapidly evaporated from the film and the film was getting densified.As the “LPD-SiO2” film deposited at the room temperature showed very good results of chemical etching rate and of step coverage, it is expected that it is possible to use this “LPD- SiO2” film in the wide range of industrial area.

An Instrument Established for the High Temperature Measurement of Ultraviolet-Visible Absorption Spectra of Molten Fluoride Salt Behaving As Coolant in the Molten Salt Reactor

2018 ◽  
Author(s):  
Hongtao Liu ◽  
Yiyang Liu ◽  
Tao Su
Keyword(s):  
High Temperature ◽  
Molten Salts ◽  
Room Temperature ◽  
Chemical Properties ◽  
Molten Salt Reactor ◽  
Physical And Chemical Properties ◽  
Molten Fluoride ◽  
Fluoride Salts ◽  
Physical And Chemical ◽  
And Chemical Properties

Molten salts were widely used in nuclear and solar power field due to the excellent heat transfer and storage. Molten fluoride salts were selected as primary and secondary coolants in the Molten Salt Reactor Experiment (MSRE) developed by Oak Ridge National Laboratory (ORNL). Therefore, it is dramatically important to study the physical and chemical properties of molten fluoride salts that impact on the design of reactor core and thermohydraulics. The molecular structure directly determines the physical and chemical properties of matter, so it is also essential to study the structure of molten salts. Spectroscopy has been proven to be a very useful tool for investigating molten salts structures. However, the standard instrument is inapplicable for measurement of the high temperature molten salts, especially for molten fluoride salts. To obtain the ultraviolet-visible (UV-Vis) absorption spectra of molten salts at high temperature, an instrument was designed to study the structures of molten salts in situ. The instrument is mainly composed of a vertical pit furnace connecting with a glovebox and an assembled cuvette which can operate from room temperature up to 800°C. The assembled cuvette is made of Hastelloy C/N as the main body with a reverse ‘T’ contour and diamond or crystalline CaF2 etc. as the window plates, so it can withstand the corrosion produced by the sample and allow the interest light passing through. The effective spectral range of this instrument is from 200 to 1000 nm. Performances of the instrument are testified by spectral studies on water under room temperature and molten salts under high temperature.

U(VI) Extraction by 8-hydroxyquinoline: a comparison study in ionic liquid and in dichloromethane

2017 ◽  
Vol 105 (6) ◽  
Author(s):  
Li-Yong Yuan ◽  
Xiang-Hong Liao ◽  
Zhi-Rong Liu ◽  
Zhi-Fang Chai ◽  
Wei-Qun Shi
Keyword(s):  
Room Temperature ◽  
Chemical Properties ◽  
Liquid Extraction ◽  
Physical And Chemical Properties ◽  
Comparison Study ◽  
New Class ◽  
Liquid Liquid Extraction ◽  
Physical And Chemical ◽  
Fuel Reprocessing ◽  
And Chemical Properties

AbstractRoom temperature ionic liquids (RTILs) represent a recent new class of solvents with potential application in liquid/liquid extraction based nuclear fuel reprocessing due to their unique physical and chemical properties. The work herein provides a comparison of U(VI) extraction by 8-hydroxyquinoline (HOX) in a commonly used RTIL, i.e. 1-butyl-3-methylimidazolium hexafluorophosphate ([C

Thermal Transport in the Copper Powders with Nanometer and Micrometer Particles

2010 ◽  
Vol 126-128 ◽  
pp. 952-956 ◽  
Author(s):  
Ching Yen Ho ◽  
Yu Hsiang Tsai ◽  
Feng Ming Sui
Keyword(s):  
Constant Temperature ◽  
Room Temperature ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Nanosized Particles ◽  
Bulk Materials ◽  
Processing Technologies ◽  
Copper Powders ◽  
Physical And Chemical ◽  
And Chemical Properties

This paper investigates effects of particle size on heat transfer in copper powders. The understanding for thermal properties of the powder is advantageous to the advancement of the processing technologies such as laser cladding, laser sintering, powder metallurgy and its other applications. Nanosized particles possess characteristic physical and chemical properties different from those of bulk materials due to the confinement of electrons, excitons, and photons into small volumes. Therefore it is valuable to discuss the thermal behaviours of powders constituted by nanometer-sized particles. The powder is wrapped up in the slender tube. One end of the slender tube filled with powder is connected to the low constant-temperature reservoir and the other end is kept at room temperature. The temperature histories at the 1cm location of the slender tube from the low constant-temperature reservoir are recorded using thermal couples. Powders of particles with the sizes 50nm and 5000nm are employed in this experiment. The results show that the thermal diffusion in the 50nm Cu powder is faster than that in the 5000nm Cu powder.

Mechanical Properties of ZrO2–LaMgAl11O19 Ceramics

2012 ◽  
Vol 512-515 ◽  
pp. 455-458 ◽  
Author(s):  
Xin Min ◽  
Ming Hao Fang ◽  
Yan Gai Liu ◽  
Zhao Hui Huang ◽  
Feng Jiao Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Room Temperature ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Transformation Toughening ◽  
Flexure Strength ◽  
Phase Transformation Toughening ◽  
Physical And Chemical ◽  
And Chemical Properties

ZrO2 ceramics have been widely used to many fields with its excellent physical and chemical properties, but the mechanical properties of YSZ ceramics, especially the fracture toughness, decline caused by the failure of the phase transformation toughening at high temperature. In this investigation, plate-like LaMgAl11O19 toughened ZrO2 ceramics were prepared by pressureless sintering at 1550 °C for 3h in air . The bulk density of the sintered samples are between 5.5 to 6.0 g/cm3, and the relative density are above 93%. The mechanical properties of the ZrO2-LaMgAl11O19 ceramics were studied systematically at room temperature. The flexure strength and fracture toughness of ZrO2-LaMgAl11O19 ceramic are 811.8 MPa and 13.9 MPa•m½ with the LMA addition of 2wt%.

scholarly journals On certain physical and chemical properties of solutions of chloroform and other anæsthetics. -A contribution to the chemistry of anæsthesia. (Second communication)

1906 ◽  
Vol 77 (515) ◽  
pp. 86-102 ◽  
Keyword(s):  
Body Temperature ◽  
Vapour Pressure ◽  
Room Temperature ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Straight Line ◽  
Haemoglobin Solution ◽  
Physical And Chemical ◽  
Complete Precipitation ◽  
And Chemical Properties

In a previous communication we have shown (1) that chloroform has a much higher solubility in serum or hæmoglobin solutions than in water or saline; (2) that at the same vapour-pressure of the chloroform the amount dissolved in serum or hæmoglobin solution is considerably higher than in saline or water; (3) that the curve of chloroform vapour-pressure and concentration in solution in the case of water and saline is a straight line, while in the case of serum and hæmoglobin solution it is a curve showing association at the higher vapour-pressures; (4) that in the case of serum addition of chloroform causes an opalescence and a show precipitation at room temperature (15ºC.), and at body temperature (40ºC.) a rapid, though incomplete, precipitation, also in the case of hæmoglobin, 1.5 to 2 per cent. of chloroform causes a changes of colour and commencing precipitation at room temperature, which becomes almost complete in the thermostat at 40ºC., while 5 per cent. and over causes complete precipitation, even at 0ºC. In our previous paper we also recorded the relations between chloroform vapour-pressure and concentration of the anæthetic in solution for water, saline and serum, throughout a range from below the anæthetising value to nearly saturation, and gave curves illustrating these relationships.

scholarly journals Image Processing and Optical-Electricity Property of Traditional Medicine Products from Kian Sand Worm (Siphonosoma ur - pulau )

2019 ◽  
Vol 2 (3) ◽  
pp. 148-156
Author(s):  
Amrosius Masrikat ◽  
Yohansli Noya ◽  
Hendry Izaac Elim
Keyword(s):  
Image Processing ◽  
Grain Size ◽  
Traditional Medicine ◽  
Room Temperature ◽  
Voltage Dependence ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Different Types ◽  
Physical And Chemical ◽  
And Chemical Properties

Kian sandworm (Siphonosoma ur-pulau), a kind of sandworm originally found in Ur-pulau island of Tual region, southeast part of Maluku province, Indonesia is one of the longest sand worm with the length of 27.5 cm exhibited unique physical and chemical properties [1]. This work presents image processing and optical-electricity property of traditional medicine products (TMPs) from Kian sandworm. Based on the image processing with fast Fourier transform (FFT) technique, the density of two different types of TMPs can be identified exactly. Furthermore, optical-electricity (OE) properties of the products tested in a standard toxic medicine, Betadine normally used to heal outer wounds of human body in Indonesia has been studied briefly under the influence of room temperature up to ~65 0C. The significant findings in this paper show that at the same concentration of two TMPs, the smooth grain size exhibits large absorbance (Abs) and pH higher than that of the rough grain size due to its high density. Moreover, it was observed that such smooth grain size TMPs shown a very sensitive voltage dependence on temperature with the peak of voltage obtained at ~50 0C.

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