scholarly journals Thermal Decomposition Properties of Gamma-Irradiated Polyvinyl Alcohol (PVA)/Methyl Cellulose (MC) Blends

2018 ◽  
Vol 9 (6) ◽  
pp. 339-357
Author(s):  
Magdy Senna ◽  
Reham Helal ◽  
Tahia Mostafa ◽  
Abdel Wahab El-Naggar
Keyword(s):  
Thermal Decomposition ◽  
Polyvinyl Alcohol ◽  
Methyl Cellulose ◽  
Gamma Irradiated ◽  
Decomposition Properties

Improvement of Ti/RuO2–IrO2 Anode Lifetime and Electrocatalytical Properties by Using an Eco-Friendly Thermal Decomposition Method Using Polyvinyl Alcohol as Solvent

2019 ◽  
Author(s):  
Charlys Bezerra ◽  
Géssica Santos ◽  
Marilia Pupo ◽  
Maria Gomes ◽  
Ronaldo Silva ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Polyvinyl Alcohol ◽  
High Efficiency ◽  
Electrochemical Impedance ◽  
Pechini Method ◽  
Low Cost ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Calcination Temperatures ◽  
Service Lifetime

<p>Electrochemical oxidation processes are promising solutions for wastewater treatment due to their high efficiency, easy control and versatility. Mixed metal oxides (MMO) anodes are particularly attractive due to their low cost and specific catalytic properties. Here, we propose an innovative thermal decomposition methodology using <a>polyvinyl alcohol (PVA)</a> as a solvent to prepare Ti/RuO<sub>2</sub>–IrO<sub>2</sub> anodes. Comparative anodes were prepared by conventional method employing a polymeric precursor solvent (Pechini method). The calcination temperatures studied were 300, 400 and 500 °C. The physical characterisation of all materials was performed by X-ray diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy, while electrochemical characterisation was done by cyclic voltammetry, accelerated service lifetime and electrochemical impedance spectroscopy. Both RuO<sub>2</sub> and IrO<sub>2</sub> have rutile-type structures for all anodes. Rougher and more compact surfaces are formed for the anodes prepared using PVA. Amongst temperatures studied, 300 °C using PVA as solvent is the most suitable one to produce anodes with expressive increase in voltammetric charge (250%) and accelerated service lifetime (4.3 times longer) besides reducing charge-transfer resistance (8 times lower). Moreover, the electrocatalytic activity of the anodes synthesised with PVA toward the Reactive Blue 21 dye removal in chloride medium (100 % in 30 min) is higher than that prepared by Pechini method (60 min). Additionally, the removal total organic carbon point out improved mineralisation potential of PVA anodes. Finally, this study reports a novel methodology using PVA as solvent to synthesise Ti/RuO<sub>2</sub>–IrO<sub>2</sub> anodes with improved properties that can be further extended to synthesise other MMO compositions.</p>

Studies on the Thermal Decomposition of Polyvinyl Alcohol by the Mass Spectrometer

1957 ◽  
Vol 14 (150) ◽  
pp. 528-532 ◽  
Author(s):  
Hideo Futama ◽  
Hidejiro Tanaka ◽  
Jiroku Jinnai
Keyword(s):  
Thermal Decomposition ◽  
Polyvinyl Alcohol ◽  
Mass Spectrometer

Effect of rGO–Fe2O3 nanocomposites fabricated in different solvents on the thermal decomposition properties of ammonium perchlorate

CrystEngComm ◽  
2018 ◽  
Vol 20 (43) ◽  
pp. 7010-7019 ◽  
Author(s):  
Ming Zhang ◽  
Fengqi Zhao ◽  
Yanjing Yang ◽  
Jiankan Zhang ◽  
Na Li ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Ammonium Perchlorate ◽  
Solvothermal Method ◽  
Decomposition Properties

rGO–Fe2O3 composites were fabricated using different solvents via a solvothermal method, and used for thermal decomposition of ammonium perchlorate (AP).

Study on Burning and Thermal Decomposition Properties of HTPB Propellant Containing Synthesized Micro-nano Ferric Perfluorooctanoate

2019 ◽  
Vol 44 (3) ◽  
pp. 362-368 ◽  
Author(s):  
Fei Zhen ◽  
Xu-Yuan Zhou ◽  
Li-Qiong Wang ◽  
Rong-Jie Yang ◽  
Feng-Lei Huang
Keyword(s):  
Thermal Decomposition ◽  
Htpb Propellant ◽  
Decomposition Properties

Properties of aqueous solutions of methyl cellulose-polyvinyl alcohol blends

2006 ◽  
Vol 79 (12) ◽  
pp. 2007-2012 ◽  
Author(s):  
A. M. Bochek ◽  
I. L. Shevchuk ◽  
L. M. Kalyuzhnaya
Keyword(s):  
Polyvinyl Alcohol ◽  
Aqueous Solutions ◽  
Methyl Cellulose
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