Dissertation > Excellent graduate degree dissertation topics show

Synthesis and Study of A Novel Epoxy Resin Modified with Phosphorus and Silicon

Author: YuYingHeng
Tutor: LiuZhiMeng；JiaDeMin
School: South China University of Technology
Course: Materials Science
Keywords: flame retardancy epoxy resign phosphor silicon
CLC: TQ323.5
Type: Master's thesis
Year: 2010
Downloads: 176
Quote: 1
Read: Download Dissertation

Abstract


A novel epoxy resin (Si-P-E44) modified with hydroxyl-terminated polydimethyl siloxane (HTPDMS) and 10-dihydro-9-oxa-10-phospha-phenanthrene- 10-oxide (DOPO) was synthesized. At the same time, an epoxy resin (P-E44) modified with DOPO and an epoxy resin (Si-E44) modified with HTPDMS were also synthesized.The structure of the epoxy resins which were told above was confirmed by FTIR and NMR spectra. The curing kinetic parameter of the reaction between Si-P-E44 and DDM was investigated by DSC analytical method. The results demonstrated that the apparent activation energy Ea=44.36kJ/mol, and the reaction order n was 0.91. And Ea of the curing kinetic parameter of the reaction between E44 and DDM was 55.43kJ/mol, the n was 0.92. The result shows that Ea of E44 was higher than that of Si-P-E44. Thermal degradation behaviors and the thermal stability of the cured epoxy resins were investigated by thermo-gravimetric analysis (TGA). It could be noted that the adding silicon can improve the thermo-stability of the epoxy resins, but the phosphors could not. The adding silicon and phosphor can both improve the char yield of epoxy resins. The impact strength of P-E44 was lowest. The Si-P-E44 was highest of the three. The Moisture Testing indicated that adding phosphor and silicon can reduce the moisture absorption rate.The flame retardance of the resins was evaluated by the results of the Oxygen Analyzer, Vertical Horizontal burning tester and Cone Calorimeter test. The results show that Compare to E44, the ignition time of Si-E44/P-E44/Si-P-E44 increases from15s、25s、22s and 27s, the average heat-releasing rate decreases from 239.8 kW /m2 to 146.4 kW /m2、150.1 kW /m2 and 140.8 kW /m2, the maximum heat-releasing rate decreases from 815.98kW /m2 to 471.2 kW /m2、493.6 kW /m2 and 446.9 kW /m2, the oxygen limit index increases from 26.0 to 29.6、30.5 and 31.2, the combustion residue increases from 13.9% to 17.9%、16.8% and 16.2%, respectively. The LOI result shows that Si-E44, P-E44 and Si-P-E44 can reach 29.6, 30.5 and 31.2, respectively. It can get conclusions from the Vertical Horizontal burning tester that Si-E44 was UL94 V1 and P-E44 and Si-P-E44 were UL94 V0. Si-P-E44 shows excellent flame retardance.This research could provide a basis for developing a novel low-cost, efficient flame-retardant epoxy resin.

Related Dissertations

  1. Fire Retardancy Performance of Poly (Ethylene Terephthalate) Containing Melamine Cyanurate,TB383.1
  2. Research on Influnce of Silicon and Sulfur on Arsenic Uptake and Accumulation of Rice (Oryza Sativa L.),S511
  3. Degradation of Amorphous Silicon Thin Film Transistors under Gate and Drain Voltage Bias Stress,TN321.5
  4. Fabrications and Applications of Microelectrode Array of Silicon Dioxide Cavities and Magnetic Ferroferric Oxide Nano-Bioconjunctions,TB383.1
  5. Design and Optimize of LED Packaging Process,TN312.8
  6. A Driving Scheme for 7 Inch VGA μc-Si AMOLED,TN873
  7. Fabrication of High-Aspect-ratio Micro/Nano Hierarchical Structures Mimicking Gecko Foot-Hair,TB391
  8. A Study on the Marketing Strategy of WISCO Oriented Silicon Steel,F426.31
  9. Discover for Universities Involved in the Exploration of Rare-Earth Hi-Tech Zone,G649.2
  10. Influence of Phosphor Settling on Optical Consistency of High-Power LED,TM923.04
  11. Research on Fabrication Technology of A-Si:H/c-Si Hetero-Junction Solar Cells,TM914.4
  12. SiO 2 microspheres as the precursor of the white LED phosphor synthesis and properties of,TN104.3
  13. Blue phosphor for PDP SrMgAl 10 O 17 : Eu 2 of combustion synthesis , surface modification and luminescence properties of,TN104.3
  14. Preparation 3DC_f/SiC vapor infiltration of silicon structure, performance and interface Regulation,TB332
  15. Nitrogen oxide silicon nitride ceramic fiber reinforced ceramic matrix composites through the waves and Properties,TB332
  16. Non-oriented silicon organic - inorganic composite coating on very thick insulation,TG174.4
  17. Metal-halide Lamp Recycling Collection Technology,X705
  18. Research on Silicon Nanowire Sensors Fabricated by Nanoimprint Lithography Combined with Angle Deposition,TP212
  19. Preparation of phase separation of the amorphous silicon oxide and nanocrystalline silicon mosaic silica,TN304.1
  20. The Influence of Field Penetration to N-type Silicon Field Emission Electron Spectroscopy,O463.1
  21. Synthesis and Property Study of Borate and Chlorosilicate Phosphor,O482.31

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polycondensation resin and plastic > Epoxy resins and plastics
© 2012 www.DissertationTopic.Net  Mobile