Study by electrical conductivity and infrared spectrometry of the thermal stability of defective iron spinels with aluminium and chromium

1988 ◽  
Vol 23 (3) ◽  
pp. 872-878 ◽  
Author(s):  
B. Gillot ◽  
F. Jemmali ◽  
M. Laarj ◽  
F. Chassagneux ◽  
A. Rousset
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Infrared Spectrometry ◽  
Thermal Stability Of

The Research on the Disperse Form of PEO Fiber by Electrostatic Spinning Method

2012 ◽  
Vol 601 ◽  
pp. 110-114
Author(s):  
Ting Lou ◽  
Yan Bo Wu ◽  
Tie Ben Song
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Solution Viscosity ◽  
Electrostatic Spinning ◽  
Nano Fiber ◽  
Disperse Form ◽  
Rotary Viscometer ◽  
Derivative Thermogravimetry ◽  
Thermal Stability Of ◽  
Better Than

We prepared PEO nano fiber with different concentration of PEO acid solution by electrostatic spinning in different technology conditions. Then we studied the property of solution by rotary viscometer instrument and electrical conductivity spectrometer, the disperse form of the fiber by SEM scattered forms, the thermal property of the composite was studied by thermogravimetry and derivative thermogravimetry (TG-DTA). The conclusion is the disperse form of fiber is controlled by the concentration of solution, the voltage of spinning, the distance of solidification. The important factor is about the solution. To increase the solution viscosity and the solidification distance, reduce the spinning voltage would decrease the diameter of the fiber. Thermal stability of fiber was significantly better than powder.

scholarly journals Thermal Stability and Flame Retardancy of Polypropylene Composites Containing Siloxane-Silsesquioxane Resins

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1019 ◽  
Author(s):  
Arkadiusz Niemczyk ◽  
Katarzyna Dziubek ◽  
Beata Sacher-Majewska ◽  
Krystyna Czaja ◽  
Justyna Czech-Polak ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardancy ◽  
Cone Calorimeter ◽  
Flame Retardants ◽  
Infrared Spectrometry ◽  
Material Surface ◽  
Polypropylene Composites ◽  
Air Atmosphere ◽  
First Time ◽  
Thermal Stability Of

A novel group of silsesquioxane derivatives, which are siloxane-silsesquioxane resins (S4SQ), was for the first time examined as possible flame retardants in polypropylene (PP) materials. Thermal stability of the PP/S4SQ composites compared to the S4SQ resins and neat PP was estimated using thermogravimetric (TG) analysis under nitrogen and in air atmosphere. The effects of the non-functionalized and n-alkyl-functionalized siloxane-silsesquioxane resins on thermostability and flame retardancy of PP materials were also evaluated by thermogravimetry-Fourier transform infrared spectrometry (TG-FTIR) and by cone calorimeter tests. The results revealed that the functionalized S4SQ resins may form a continuous ceramic layer on the material surface during its combustion, which improves both thermal stability and flame retardancy of the PP materials. This beneficial effect was observed especially when small amounts of the S4SQ fillers were applied. The performed analyses allowed us to propose a possible mechanism for the degradation of the siloxane-silsesquioxane resins, as well as to explain their possible role during the combustion of the PP/S4SQ composites.

scholarly journals Polar Side Chains Enhance Processability, Electrical Conductivity, and Thermal Stability of a Molecularly p-Doped Polythiophene

2017 ◽  
Vol 29 (24) ◽  
pp. 1700930 ◽  
Author(s):  
Renee Kroon ◽  
David Kiefer ◽  
Dominik Stegerer ◽  
Liyang Yu ◽  
Michael Sommer ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Side Chains ◽  
Thermal Stability Of
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