Electrical conductivity of polymer blends containing liquid crystalline polymer and carbon black

2004 ◽  
Vol 44 (3) ◽  
pp. 528-540 ◽  
Author(s):  
R. Tchoudakov ◽  
M. Narkis ◽  
A. Siegmann
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Polymer Blends ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer

Morphology and Electrical Conductivity of Ternary Polymer Blends Involving Liquid Crystalline Polymer Containing Carbon Nanotubes

2017 ◽  
Vol 2 (16) ◽  
pp. 4349-4359 ◽  
Author(s):  
Vivek. R ◽  
Tilak Pattnaik ◽  
Amrita V. Poyekar ◽  
Kuruvilla Joseph ◽  
George P. Simon ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polymer Blends ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Ternary Polymer

In situ compatibilized polypropylene/liquid crystalline polymer blends

Polymer ◽  
1996 ◽  
Vol 37 (18) ◽  
pp. 4099-4106 ◽  
Author(s):  
Yei-Po Chiou ◽  
Kuo-Chan Chiou ◽  
Feng-Chih Chang
Keyword(s):  
Polymer Blends ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer

Properties of Thermotropic Liquid Crystalline Polymer Blends

2019 ◽  
pp. 331-364
Author(s):  
Tsung-Tang Hsieh ◽  
Carlos Tiu ◽  
George P. Simon ◽  
Stuart R. Andrews ◽  
Graham Williams ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Thermotropic Liquid Crystalline Polymer

Electrical Conductivity of High Impact Polystyrene/Liquid Crystalline Polymer/ Carbon Black Ternary Systems

2002 ◽  
Vol 725 ◽  
Author(s):  
Roza Tchoudakov ◽  
Ester Segal ◽  
Moshe Narkis ◽  
Arnon Siegmann
Keyword(s):  
Carbon Black ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Ternary Systems ◽  
Crystalline Polymer ◽  
High Impact ◽  
Melt Flow ◽  
Immiscible Polymer Blends ◽  
Electrically Conductive ◽  
High Impact Polystyrene

AbstractElectrically conductive immiscible polymer blends containing high impact polystyrene (HIPS), liquid crystalline polymer (LCP) and a low content of conductive carbon black (CB) were studied to establish and understand the correlation between composition, electrical properties and the morphology of filaments produced at different melt flow conditions. The HIPS/LCP/CB blend containing 30% LCP and at least 2 phr CB reveals a stable resisitivity throughout the shear rate range applied in a capillary rheometer. Interesting structure alterations were observed for the LCP and CB components as a result of melt flow processing. Unusual sensing properties of liquids were found for the blends containing LCP.

Rheological Properties of Carbon Fiber and Carbon Black Filled Liquid Crystalline Polymer Melts

2001 ◽  
Vol 11 (4) ◽  
pp. 188-196 ◽  
Author(s):  
Katsuhiko Araki ◽  
Takeshi Kitano ◽  
Berenika Hausnerova
Keyword(s):  
Shear Rate ◽  
Carbon Fiber ◽  
Carbon Black ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Filler Content ◽  
Crystalline Polymer ◽  
Normal Stress Difference ◽  
Steady Shear Viscosity ◽  
Rate Region

Abstract The rheological properties of thermotropic liquid crystalline polymer (LCP) and its carbon fiber (CF) and carbon black (CB) filled composites in molten state were measured using a cone-plate rheometer. The measurements of the CF/LCP and CB/LCP melts were performed with carbon fiber contents of 5, 10 and 20 wt %, and carbon black contents of 1.5, 3, 5, 10 and 20 wt %. As expected, steady shear viscosity of the LCP, CF/LCP and CB/LCP melts in a low shear rate region (0.1 to 1 s-1) decreased with an increase of temperature and increased with rise of filler content. In shear rate region of 1 to 50 s-1, the LCP melt showed a unique viscosity behaviour with maximum and minimum values. The CF/LCP and CB/LCP melts showed disappearance of such a unique viscosity behaviour with an increase in the CF (CB) content and an increase of temperature. CB filler had a more pronounced effect on the disappearance of the unique viscosity behaviour in comparison with CF. Regarding apparent yield stress, the CF/LCP melts gave the same value as pure LCP, the CB/LCP melts showed an increase of yield with a rise of the filler content. In addition, the first normal stress difference of the LCP and CF/LCP melts are smaller than yield stress values, although the rate of increase with shear rate is higher in case of normal stress difference than in case of yield. The results of the dynamic shear oscillatory flow measurements of CF and CB based compounds at 300˚C showed that both, the storage and loss moduli are more affected by carbon black filler. Complex viscosity values of the LCP and CF/LCP melts showed no such unique complex flow pattern as observed in the case of steady shear viscosity.

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