Dissertation > Excellent graduate degree dissertation topics show

Polymerization of Methyl Methacrylate Catalyzed by Novel L-arginine Schiff Base Complexes Without of Any Cocatalyst

Author: QinMinShui
Tutor: LiNing
School: Zhejiang University
Course: Chemistry
Keywords: L-arginine Schiff base Metal complexes methyl methacrylate catalytic polymerization
CLC: O631.5
Type: Master's thesis
Year: 2010
Downloads: 25
Quote: 0
Read: Download Dissertation

Abstract


In this dissertation, we synthesized Schiff base ligands 3,4-HDIA, (2,4-HDIA, HSALA) deriving from L-arginine and 3,4-dihydroxybenzaldehyde (benzaldehyde, 2,4-dihydroxybenzaldehyde,) which were characterized by 1H NMR spectra.We then synthesized transition metal Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ) and lanthanide L-arginine Schiff base complexes which were characterized with elemental analysis and U-V spectra.These complexes were then applied in the polymerization of methyl methacrylate monomer without any cocatalyst. Some Schiff base-metal complexes can catalyze polymerization without any cocatalyst. The influence of reaction conditions, such as the molar ratio of MMA/M, reaction temperature and times, as well as the catalyst concentration, was investigated in detail. The molecular weight and polydispersity of PMMA were measured separately by viscometry and GPC method, and the structure of PMMA was characterized by 1H NMR. Polymethyl methacrylate (PMMA) with high viscosity-average molecular weight (106), narrow polydispersity (2.0) and 61% syndiotacticity was obtained, which means these complexes have high catalytic activity for the polymerization of MMA.Trough the study we found Some Schiff base-transition metal or Ln metal complexes were excellent catalysts for polymerization of the polar monomer (MMA). Compared with conventional Ziegler-Natta catalyst, their lower cost, easier preparation, higher activity and narrower molecular weight distribution make them much more outstanding. Through many experiments, we found that the most important factor influencing the polymerization is the structure of Schiff base-transition metal or Ln metal complexes.

Related Dissertations

  1. Theoretical Analysis of the Circular Dichroism Spectra of Transition Metal Schiff-Base Complexes,O641.4
  2. Syntheses, Structures and Properties of Transition Metal Complexes Based on Pyridyl Ligands,O627.2
  3. Study on Polymerization and Capability of PMMA/Coal Series Kaolin Nanocomposites,TB383.1
  4. The continuous bulk Law PMMA resin polymerization process,TQ320.61
  5. Syntheses and Structure of Tri-vacant Polyoxometalate Derivatives,O614
  6. Research on the Synthesis Method of PUA and Its Coating Performance,TQ630.4
  7. Synthesis and Characterization of a Solube Ligand as a Catalyst for the Polymerization of MMA,O631.5
  8. Synthesis of Suspension Grafting PEB-g-MAN and Its Toughening Effect on SAN Resin,TQ320.7
  9. The Research of Bis-(O-vanillin) Benzoic Imine Schiff Base Synthesis and Metal Complexes,O627
  10. Studies on Synthesis and Catalytic Reactivity of Group-Ⅳ and Rare Earth Metal Complexes Incorporating Pyrrolyl Ligands,O627.3
  11. Study on Core-shell Sericite/PMMA Composites and Modification of Polymer Materials,TB324
  12. The Preparation and Characteristic of Water-free Powdery Coating in Supercritical Carbon Dioxide,TQ630.6
  13. Synthesis of Amphiphilic Copolymers Based on MMA and Their Effects on the Hydrophilization of PVDF Porous Membrane,O631.3
  14. Studies on the Synthesis and Photoluminescence Property of the Novel Bis-Schiff Base Metal Complexes,O641.4
  15. Study on Preparation of Solid Paraffin-Methacrylate Composite Latex,TQ316.334
  16. Aggregation Behavior of Block Copolymer PS-b-PMMA at the Air/Water Interface,O631.3
  17. Design, Synthesis, Structure and Properties of Polynuclear Metal Complexes with Ligands Containing Nitrogen and Oxygen Atoms,O641.4
  18. Synthese and Property of Norfloxaxin-Metal Complexes,O641.4
  19. Preparation and Properties of Polymer/Rod-Like Silicate Nanocomposites,TB383.1
  20. Synthesis, Characturization and Interaction with DNA/Serum-Albumin of Novel Complexes,O641.4

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