Title :
Study of the thermomechanical and electrical properties of conducting composites containing natural rubber and carbon black
Author :
Oliveira, F.A. ; Constantino, C.J.L.
Author_Institution :
Faculdade de Ciencias e Tecnologia, UNESP, Presidente Prudente, Brazil
Abstract :
This work shows the preparation and characterization of composites obtained by mixing natural rubber (NR) and carbon black (CB) in different percentages aiming suitable mechanical properties, processability and electrical conductivity for future applications as transducers in pressure sensors. The composites NR/CB are characterized through dc conductivity, thermal analysis using differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMA), thermogravimetry (TGA) and stress-strain test. The electrical conductivity changed from 10-9 to 10 Sm-1 depending on the percentage of CB in the composite. Besides, it was found a linear (and reversible) dependence of the conductivity on the applied pressure in the range from 0 to 1.6 MPa for the sample 80/20 (NR/CB wt%).
Keywords :
differential scanning calorimetry; differential thermal analysis; electrical conductivity; materials preparation; rubber; stress-strain relations; 0 to 1.6 MPa; 10-9 to 10 S/m; DSC; TGA; applied pressure; carbon black; conducting composites; dc conductivity; differential scanning caiorimetry; dynamic mechanical thermal analysis; electrical conductivity; electrical properties; natural rubber; pressure sensors; stress-strain test; thermal analysis; thermogravimetry; thermomechanical properties; transducers; Calorimetry; Mechanical factors; Mechanical sensors; Rubber; Sensor phenomena and characterization; Testing; Thermal conductivity; Thermal stresses; Thermomechanical processes; Transducers;
Conference_Titel :
Electrets, 2005. ISE-12. 2005 12th International Symposium on
Print_ISBN :
0-7803-9116-0
DOI :
10.1109/ISE.2005.1612394
