Effect of the second filler which melted during composite fabrication on the electrical properties of short fiber polymer-matrix composites

1992 ◽  
Vol 21 (11) ◽  
pp. 1065-1071 ◽  
Author(s):  
Lin Li ◽  
Pay Yih ◽  
D. D. L. Chung
Keyword(s):  
Electrical Properties ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Short Fiber ◽  
Matrix Composites ◽  
Composite Fabrication

UV Photopatternability and Electrical Properties of GnF/SU-8 Composites Controlled by GnF Concentration

2018 ◽  
Vol 765 ◽  
pp. 60-64
Author(s):  
Seung Pyo Woo ◽  
Sung Min Park ◽  
Gyung Mok Nam ◽  
Young Choi ◽  
Sang Heon Park ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Polymer Matrix ◽  
Material Properties ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Electrically Conductive ◽  
Screening Effect ◽  
Unique Material ◽  
Uv Dose

The GnF/SU-8 composites are new polymer matrix composites (PMCs) composed of graphite nanoflakes (GnFs) bound together by SU-8 photoresist. The PMCs therefore have excellent ultraviolet (UV) photopatternability and high electrical properties. In spite of the unique material properties of GnF/SU-8 composites, much still remains uncertain about their controllability in both UV photopatternability and electrical properties. Here, we investigate 7 kinds of GnF/SU-8 composites having different GnF concentrations of 5.0 to 25.0 wt.% to characterize the changes in the UV photopatternability (i.e., polymerized thickness and photopattern quality) and electrical conductivity of GnF/SU-8 composites caused by a variation in GnF concentration. The polymerized thickness of GnF/SU-8 composites is measured to be in the range of 4.06 to 23.99 μm, which is inversely proportional to GnF concentration and also directly proportional to UV dose (i.e., 345 to 3,450 mJ/cm2) because of the screening effect of GnF existed in the composites; the photopattern quality at the edge is in inverse proportion to GnF concentration. An increase in GnF concentration leads to a significant change in the electrical conductivity of GnF/SU-8 composites in a proportional way (up to 25.34 S/m). The GnF/SU-8 composites are expected to be widely used as UV photopatternable and electrically conductive PMCs for diverse engineering applications.

Effect of Processing on the Microstructure and Electrical Conductivity of Hot Pressed PMMA/ITO Bulk Nanocomposites

2006 ◽  
Vol 977 ◽  
Author(s):  
Charles J. Capozzi ◽  
Rosario A. Gerhardt
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Polymer Matrix ◽  
Indium Tin Oxide ◽  
Polymer Matrix Composites ◽  
Processing Parameters ◽  
Specimen Thickness ◽  
Matrix Composites ◽  
Matrix Nanocomposites ◽  
Network Microstructure

AbstractThere are few studies that discuss the effect of the fabrication conditions and bulk thickness on the electrical conductivity of hot pressed polymer-matrix composites. For polymer-matrix composites that possess a segregated-network microstructure, the processing parameters can significantly impact the electrical properties and microstructure of the composite material. Our group has recently fabricated novel polymer-matrix nanocomposites, which possess a segregated network microstructure containing regular, polyhedral-shaped polymer matrix particles1-2. This paper investigates the effect of processing pressure and specimen thickness on the electrical properties and microstructure of hot pressed poly(methyl methacrylate) (PMMA) containing segregated networks of indium tin oxide (ITO) nanopowders.

Thermoelectric structural composites and thermocouples using them

2001 ◽  
Vol 691 ◽  
Author(s):  
Shoukai Wang ◽  
Sihai Wen ◽  
Victor H. Guerrero ◽  
D.D.L. Chung
Keyword(s):  
Carbon Fiber ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Short Fiber ◽  
Cement Matrix ◽  
Matrix Composites ◽  
Structural Composites ◽  
Reinforcing Fibers ◽  
Continuous Carbon Fiber ◽  
Particulate Filler

ABSTRACTThe tailoring of the sign and magnitude of the absolute thermoelectric power was achieved in structural composites by the choice of the reinforcing fibers and of the particulate filler between laminae. The resulting thermoelectric structural composites included continuous carbon fiber polymer-matrix composites and short fiber cement-matrix composites. In addition, it resulted in thermocouples in the form of structural composites. The fibers and interlaminar filler impacted the thermoelectric behavior in the longitudinal and through-thickness directions respectively.

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