Preparation and Characteristic of PSMA/EG Composite Materials

2010 ◽  
Vol 163-167 ◽  
pp. 1951-1954
Author(s):  
Gui Xiang Hou ◽  
Hai Ning Na ◽  
Xiao Ming Sang
Keyword(s):  
High Temperature Oxidation ◽  
In Situ Polymerization ◽  
Expanded Graphite ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
Temperature Oxidation ◽  
X Ray ◽  
Graphite Nanosheets ◽  
Composite Granules

Graphite nanosheets prepared through high-temperature oxidation via powdering the expanded graphite. After soaking the expanded graphite with styrene(S) and maleic anhydride(MA) monomers, the polymer (Poly(S-co-MA))/expanded graphite(EG) (PSMA/EG) composite granules were obtained by in situ polymerization. Light microscope，scanning electron microscope and X-ray diffraction characterization were performed. SEM analysis indicate that the expanded graphite was mostly tore to sheets with thickness of 50–80 nm and with diameter of 1μm. Optical micrographs showed that the distribution of graphite platelets is found to be nearly uniform.

In situ X-ray diffraction contribution to the high temperature oxidation study of FeCrAl alloys

2002 ◽  
Vol 12 (6) ◽  
pp. 39-46
Author(s):  
R. Cueff ◽  
H. Buscail ◽  
E. Caudron ◽  
C. Issartel ◽  
S. Perrier ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
X Ray Diffraction ◽  
Temperature Oxidation ◽  
X Ray ◽  
Oxidation Study ◽  
Fecral Alloys

Polyphenylene sulfide- expanded graphite nanocomposites

2016 ◽  
Vol 30 (12) ◽  
pp. 1603-1614 ◽  
Author(s):  
BTS Ramanujam ◽  
S Radhakrishnan ◽  
SD Deshpande
Keyword(s):  
Percolation Threshold ◽  
In Situ Polymerization ◽  
Expanded Graphite ◽  
Polyphenylene Sulfide ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Graphite Nanosheets ◽  
Electrical Percolation ◽  
Scanning Electron Microcopy

Polyphenylene sulfide (PPS)-expanded graphite (ExGr) conducting nanocomposites have been prepared by powder mixing and in situ polymerization routes after sonicating ExGr particles in acetone. Synthesized PPS has been used to make powder mixed composites. The powder mixed composites exhibit a percolation threshold of 3 wt% due to the formation of graphite nanosheets. When PPS-ExGr composites are prepared by in situ polymerization route, very low electrical percolation threshold less than 0.5 wt% ExGr is obtained. The low percolation threshold obtained is attributed to better dispersion of ExGr nanosheets in the polymer matrix when compared to powder mixed composites. The synthesized PPS has been characterized by X-ray diffraction, differential scanning calorimetry, and infrared spectroscopy. The formation of graphite nanosheets has been confirmed by transmission and scanning electron microcopy analysis.

scholarly journals Synthesis and Characterization of Polypyrrole (PPy) by In-situ Polymerization Technique

2020 ◽  
Vol 6 (2) ◽  
pp. 686-688
Author(s):  
Phalak Mrunalini ◽  
Rajendra Waghulade ◽  
Yogesh Toda
Keyword(s):  
In Situ Polymerization ◽  
Ammonium Persulfate ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nano Powder ◽  
Infra Red ◽  
Granular Morphology

This work reports synthesize of polypyrrole nano powder by chemical in-situ polymerization of pyrrole in aqueous solution and ammonium persulfate solution which acts as oxidant. It is characterized by X-ray diffraction (XRD), Fourier infra-red spectroscopy (FTIR) and scanning electron microscopy (SEM). The XRD spectrum reveals that the materials are amorphous in nature. FTIR analysis confirms that all peaks are the main characteristic of PPy. SEM analysis showed that the powder has a uniform granular morphology and the size varies from ∼500 nm to 1 μm. The micrograph of polypyrrole reveals the presence of globular particles. The formed particles are irregular in nature. The results show that the fibers are chemically formed as spherical nanostructures.

The Nitridation, a Way to Improve High Temperature Oxidation Behaviour of AISI 304

2008 ◽  
Vol 595-598 ◽  
pp. 987-994 ◽  
Author(s):  
Christophe Issartel ◽  
Henri Buscail ◽  
Eric Caudron ◽  
Régis Cueff ◽  
Frédéric Riffard ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
X Ray Diffraction ◽  
Protective Oxide ◽  
Temperature Oxidation ◽  
Aisi 304 ◽  
Solid Solution Formation ◽  
X Ray ◽  
Solution Formation

The present study focuses on the high temperature oxidation of a AISI 304 chromiaforming nitrided alloy. Isothermal oxidations were performed in air, at 800°C. The effect of nitridation on the steel surface depends on the temperature of the treatment. It leads whether to a γN solid solution formation or to CrN formation. In situ X-ray diffraction has been used to follow the oxides formation. Results show the concomitant growth of CrN and Fe2O3 at the beginning of the test. Then, Cr2O3 quickly appears which leads to the formation of a protective oxide scale (a parabolic rate law is observed). Our conclusions suggest that nitridation increases the high temperature oxidation resistance of 304 steels at 800°C.

In Situ Study of the High Temperature Oxidation of X20CrMoV 12 1 in Air by means of X-Ray Diffraction

1994 ◽  
Vol 166-169 ◽  
pp. 361-366 ◽  
Author(s):  
Maria Juez-Lorenzo ◽  
Vladislav Kolarik ◽  
N. Eisenreich ◽  
W. Engel ◽  
A.J. Criado
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
X Ray Diffraction ◽  
Temperature Oxidation ◽  
X Ray ◽  
In Situ Study

High Temperature Oxidation of Fe-Al Alloys Stuedied by In Situ X-Ray Diffraction

1997 ◽  
Vol 251-254 ◽  
pp. 251-258 ◽  
Author(s):  
Vladislav Kolarik ◽  
H. Fietzek ◽  
W. Engel ◽  
B. Eltester ◽  
Hans Jürgen Grabke
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Al Alloys ◽  
X Ray Diffraction ◽  
Temperature Oxidation ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document