Dissertation > Excellent graduate degree dissertation topics show

Study on the Conductive Properties of Polyphenylacetylene Doped by Bromine and MWNTs/Bromine/Polyphenylacetylene Ternary Composites

Author: LiangDan
Tutor: XuXueCheng
School: East China Normal University
Course: Materials Physics and Chemistry
Keywords: Bromine poly(phenelacetylene) p-πconjugation conducting mechanism pressure temperature MWNTs the transfer of bromine conductive unites
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 30
Quote: 0
Read: Download Dissertation

Abstract


Through absorption of bromine vapor,the electrical conductivity of poly（phenylacetylene）（PPA） was enhanced by 1012 times.UV-Vis spectra,and XPS spectra were used to study the p-πconjugation and the conducting mechanism in bromine doped PPA.The experiment indicated that the bromine anion and charge transfer complex（CTC） formed in bromine doped PPA could promote the conductivity.The experiment illuminates that increase of the pressure can promote the conjugation between PPA and bromine and the increase of the temperature leads to the decrease of the p-πconjugated formation in PPA to reduce the conductivity.MWNTs/Bromine/Polyphenylacetylene Ternary Composites were prepared by mechanical blending and solution blending methods,exhibiting high electrical conductivity of Bromine doped MWNTs（Br doped MWNTs） 10 S/m.Through the use of ultraviolet-visible absorption spectra（UV-Vis）,X-ray spectroscopy（XPS）,and scanning electron microscope（SEM）,we studied the interaction of MWNTs,Bromine and PPA,and probed the formation of individual conductive units and their influence on the conductivity of the composites.Our study indicates that when content of MWNTs is low the transfer of bromine from PPA to MWNTs can decrease the conductivity of the compositess;when content of MWNTs is high,the conductivity of the composites enhance greatly with the increase of the conductive units.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. The Air Linear Motion Reference Design Based on Multi-Throttle,TG83
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Preparation and Electrocaloric Effect of BaxSr1-xTiO3 Ferroelectric Thin Films,TB383.2
  5. Measurement of the Surface Impedance of the High Temperature Superconducting Thin Films with Coplanar Transmission Line,O484.5
  6. Study on Contact Fatigue Life Based on Grease Variation with Temperature,TH117.22
  7. Research on Temperature Measurement Technique Based on CCD Image Sensor,TH811
  8. Development of Explosion Flame Temperature Measurement System Based on Multi-Spectral Thermometry,TH811
  9. Aerodynamic Performance Analysis of Low Pressure Turbine at Low Reynolds Numbers,V231.3
  10. Temperature Drift Modeling and Compensation of Fiber-Optic Gyroscopes,V241.5
  11. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  12. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  13. Research on Nozzle Plume Temperature Distribution Measurement System,V434
  14. Numerical Analysis of Flow Process in a Molten Carbonate Fuel Cell,TM911.4
  15. Experimental Research on Concretion Characteristics of High Temperature Syngas in Integrated Gasification Combined Cycle System,TM611.3
  16. The Basic Research of Axial Flux Inductor Type High Temperature Superconducting Motor,TM37
  17. Research on Temprature Controling Technology of Laser Diode with Thermoelectric Cooler,TN248.4
  18. Research on Millimeter Wave Imaging with Scanning Array,TP391.41
  19. The Development of Electric Control System for Product Line of Cross-Linked Cable,TP273.5
  20. Research on Temperature Control System for Laser Diode,TP273
  21. Design and Study of Temperature Chamber Control System in Servo Table,TP273

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile