scholarly journals Visco-elastic sintering kinetics in virgin and aged polymer powders

2021 ◽  
Author(s):  
J.E. Alvarez ◽  
H. Snijder ◽  
T. Vaneker ◽  
H. Cheng ◽  
A.R. Thornton ◽  
...  
Keyword(s):  
Sintering Kinetics ◽  
Polymer Powders

scholarly journals Surface modification of YS-20 with polydopamine for improving the tribological properties of polyimide composites

Friction ◽  
2021 ◽  
Author(s):  
Liangfei Wu ◽  
Zhaozhu Zhang ◽  
Mingming Yang ◽  
Junya Yuan ◽  
Peilong Li ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Tribological Properties ◽  
Metallic Copper ◽  
Great Effort ◽  
Modified Polymer ◽  
Milling Method ◽  
Multi Walled Carbon Nanotubes ◽  
Mixing Method ◽  
Walled Carbon Nanotubes ◽  
Polymer Powders

AbstractRecently, great effort has been devoted to prepare various reinforce fillers to improve polymer performances, but ignoring the importance of raw polymer powders which are indispensable parts of hot-pressed polymer composites. Herein, we engineer raw polyimide (PI) powders with the assistance of polydopamine (PDA) in aqueous solutions. After the modification, polymer powders change from hydrophobic to hydrophilic, which makes it is possible to further modification of polymer powders in liquid phase. During the curing process of modified polymer powders, the partial dehydration of the catechol groups and crosslinking of PDA via C-O-C bonds are confirmed. Based on the features of PDA, a non-destructive mixing method is utilized to realize homogeneous dispersion of multi-walled carbon nanotubes (MWCNTs) in polymer matrix. In comparison with ball milling method, this way can preserve the integrated innate structure of MWCNTs effectively. Besides, by taking full advantage of the reducing and metal-coordination capability of PDA, Cu2+ is successfully loaded onto the surfaces of polymer powders. The related characterizations demonstrate that Cu2+in situ converts to metallic copper rather than copper oxide during the hot pressing process. The tribological properties of corresponding polymer composites are also studied. These results indicate that modifying polymer powders with PDA is multi-profit and presents practical application prospect.

scholarly journals Low temperature silicon oxide deposition on polymer powders in a fluidized bed coupled to a cold remote plasma

2012 ◽  
Vol 206 (23) ◽  
pp. 4814-4821 ◽  
Author(s):  
H. Caquineau ◽  
L. Aiche ◽  
H. Vergnes ◽  
B. Despax ◽  
B. Caussat
Keyword(s):  
Low Temperature ◽  
Fluidized Bed ◽  
Silicon Oxide ◽  
Remote Plasma ◽  
Oxide Deposition ◽  
Polymer Powders

Effect of aluminate additions on the isothermal sintering kinetics of mechanically activated corundum

2007 ◽  
Vol 43 (2) ◽  
pp. 153-155
Author(s):  
N. F. Kosenko ◽  
N. V. Filatova ◽  
A. A. Shiganov
Keyword(s):  
Sintering Kinetics ◽  
Kinetics Of

Triboelectric charging of polymer powders in fluidization and transport processes

2001 ◽  
Vol 37 (3) ◽  
pp. 778-784 ◽  
Author(s):  
J.R. Mountain ◽  
M.K. Mazumder ◽  
R.A. Sims ◽  
D.L. Wankum ◽  
T. Chasser ◽  
...  
Keyword(s):  
Transport Processes ◽  
Triboelectric Charging ◽  
Polymer Powders

scholarly journals Material Evaluation and Process Optimization of CNT-Coated Polymer Powders for Selective Laser Sintering

Polymers ◽  
2016 ◽  
Vol 8 (10) ◽  
pp. 370 ◽  
Author(s):  
Shangqin Yuan ◽  
Jiaming Bai ◽  
Chee Chua ◽  
Jun Wei ◽  
Kun Zhou
Keyword(s):  
Process Optimization ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Material Evaluation ◽  
Polymer Powders

Initial sintering kinetics of non-stoichiometric CeO2−x

2021 ◽  
Vol 272 ◽  
pp. 115369
Author(s):  
Masashi Watanabe ◽  
Takayuki Seki
Keyword(s):  
Sintering Kinetics ◽  
Kinetics Of

Effect of TiO2 doping on rapid densification of alumina by plasma activated sintering

1996 ◽  
Vol 11 (5) ◽  
pp. 1144-1148 ◽  
Author(s):  
R. S. Mishra ◽  
A. K. Mukherjee ◽  
K. Yamazaki ◽  
K. Shoda
Keyword(s):  
Dielectric Properties ◽  
Full Density ◽  
Activated Sintering ◽  
Sintering Kinetics ◽  
Temperature Range ◽  
Plasma Activated Sintering

The effects of plasma cycle and TiO2 doping on sintering kinetics during plasma activated sintering (PAS) of γ−Al2O3 have been studied in the temperature range of 1473–1823 K. Multiple plasma cycle leads to higher densification. Also, TiO2 doping enhances the sintering kinetics during PAS. In TiO2 doped specimens, near full density was obtained at 1673 K in less than 6 min using multiple plasma cycle. It is suggested that the dielectric properties of a material are critical for the success of the PAS process.

Study of the Sintering Kinetics of Silicon Nitride Containing Ceria and Alumina Additives

2001 ◽  
Vol 189-191 ◽  
pp. 120-125 ◽  
Author(s):  
J. Marchi ◽  
José Carlos Bressiani ◽  
Ana Helena A. Bressiani
Keyword(s):  
Silicon Nitride ◽  
Sintering Kinetics ◽  
Kinetics Of
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