Dissertation > Excellent graduate degree dissertation topics show

Preparation and Properties of Photoconductive Materials of Poly(2-(carbazol-9-yl) Ethyl Methacrylate)

Author: JiaLiXiang
Tutor: ZhangWenLong
School: Harbin University of Science and Technology
Course: Polymer Chemistry and Physics
Keywords: Poly ( methyl methacrylate ) N - vinyl carbazole Synthesis Characterization Photoconductive
CLC: O631.3
Type: Master's thesis
Year: 2011
Downloads: 17
Quote: 0
Read: Download Dissertation

Abstract


The carbazoles polymer has excellent optical performance and hole conduction transmission performance , has broad application prospects in the energy , defense , information , health care , environmental protection, agriculture and other fields . Polyvinylcarbazole (PVK) because of their excellent photoconductive characteristics become best studied polymeric photoconductive material , but its presence high glass transition temperature , the film is poor , brittleness and other shortcomings , which greatly limits its research and application . This paper focuses on polymethacrylate ethylcarbazole acid ester (PCEM) , preparation methods , process conditions and photoconductive properties , lay the foundation for the research and application of new polymer photoconductive material . The transesterification method and nucleophilic substitution synthesis of methacrylic acid ethyl carbazole ester (CEM), the technological characteristics of the two kinds of preparation methods . The transesterification prepared CEM short time . The nucleophilic substitution prepared CEM post-processing is required chlorine ethylcarbazole readily available raw materials ( microwave synthesis ) . The microwave prepared chloroethyl carbazole process : stirring , the reaction temperature of 45 ° C , the reaction time was 40min , the microwave power is 600W . Microwave heating synthesis of chloro- ethyl carbazole than conventional heating short reaction time , low temperature , high yield . The conditions of preparation PCEM the system . Determine the preparation conditions : the CEM as raw materials , DMF as solvent , the reaction temperature was 85 ° C , reaction time 14h , initiator amount of the agent of AIBN 0.005g . By UV spectroscopy, infrared spectroscopy, NMR spectroscopy , gel permeation chromatography analysis method to characterize the synthesized product , and the PCEM studied by DSC and film . The results showed that : successfully synthesized a number average molecular weight of 2.9089 × 104g/mol PCEM , its glass transition temperature is 145.2 ° C , 40 ° C lower than PVK (185.4 ℃) has significantly improved deposition sexuality for PVK ; through the photoconductive test study PCEM photoelectric properties , compared with PVK . The analysis showed that: the PCEM the photoconductivity than PVK slightly higher under the same conditions , and the reaction temperature and reaction time to have a certain influence on the optical conductivity of the PCEM ; reaction time 14h , the reaction temperature was 85 ° C under PCEM photoconductivity a maximum of 5.469 × 10-18 S · cm -1 .

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Synthesis and Characterization on Semi-Aromatic Polyamides Containing Benzoxazole Units,O633.5
  3. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  4. The convergence of mathematics teaching in primary and secondary schools under the new curriculum with the problem representation,G633.6
  5. Video Coding Research Based on Texture Characteristics,TP391.41
  6. Poetic alienation : graphics,J506
  7. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  8. The Total Synthesis of a Flavonoid Glycoside Apigenin-7-O-β-D-glucuronide,R284.1
  9. Atovaquone analogues Design, Synthesis and antitumor activity of,R914
  10. Studies on Synthesis, Characterization and Properties of Fe-V Co-doped TiO2 Catalyst,O614.411
  11. Synthesis and Seperation of 1,1’-binaphthol,O625.3
  12. Characterization of Corn Lectin and Application to Screen of Growth-promoting Bacteria from Corn Rhizosphere,S513
  13. Flexible,rigid,Synthesis and characterization of mixed ligand complexes,O621.1
  14. Synthesis and Performance Study of Bisphenol AP-based Polybenzoxazines,TQ320.1
  15. Study on the Synthetic Process of Vat Pink R,TQ616.2
  16. Health-based and Ecological Risk Assessment of Contaminated Sites,X820.4
  17. Preliminary Research on Characterization of Thermophilic Protease Pasey and Helicase Htc16,Q814
  18. Cloning and Expression of Xylanase Gene from Thermobifida Halotolerans YIM 90462~T,Q78
  19. Study on the Mechanism of Night Temperature to Grain Filling of Inferior in Rice,S511
  20. Gold-catalyzed Addition Reaction of Sulfonates and Alkynes and Study of Synthesis and Bioactivity of (E)-3-phenyl-substituted Acrylic Acids,R914
  21. Isolation and Characterization of Carbendazim-Degrading Strains, Cloning and Expression of the mheI Gene,X172

CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers
© 2012 www.DissertationTopic.Net  Mobile