Dissertation > Excellent graduate degree dissertation topics show

Tuning the Cloud Point of Poly(2-(Dimethylamino) Ethyl Methacrylate) Solution by Inclusion Complexation with Cyclodextrin

Author: ZhaoYu
Tutor: WangLiYan
School: Jilin University
Course: Polymer Chemistry and Physics
Keywords: thermosensitive polymers PDMAEMA RM-β-CD cloud point inclusion complexation
CLC: O631.3
Type: Master's thesis
Year: 2009
Downloads: 63
Quote: 0
Read: Download Dissertation

Abstract


After four decades of development, thermosensitive polymers have been made great progress in controlling the phase separation temperature. Now, people can roughly design or synthesize thermosensitive polymers of a specific cloud point through a variety of ways. However, the research mainly focused on PNIPAAm, there were few reports about other thermosensitive polymers. And most methods of controlling cloud points were copolymerization with another hydrophilic/hydrophobic monomer. Based on the above considerations, we use a supramolecular approach to control the cloud point of thermosensitive polymer solution with CDs as additives.Firstly, we synthesized PDMAEMA with different molecular weights by radical polymerization. We studied on the influence of molecular weight, concentration and pH on cloud point of PDMAEMA solutions. The increase in molecular weight and concentration both caused a decline in cloud points. Changing pH value also affected the cloud point, because of the different protonated degree of PDMAEMA side chains.Secondly, we select the standard borate buffer solution (pH = 9.18) as the test environment. We studied the influence of addition of RM-β-CD on cloud point of PDMAEMA solutions, and made comparison to addition ofα-CD,β-CD,γ-CD. Addition of RM-β-CD made the cloud point of PDMAEMA solutions gradually increase, and it is caused by inclusion complexation between RM-β-CD and PDMAEMA that was confirmed by the 1D NOE and 2D NOESY measurements. The influence of addition ofβ-CD is similar to that of RM-β-CD, but addition ofα-CD andγ-CD had no effect. The inclusion stoichiometry of RM-β-CD and PDMAEMA equals 1, which was determined by Job’s method.Finally, we systematically studied the influence of addition of different amounts of RM-β-CD on the cloud points of PDMAEMA solutions. Based on appropriate assumptions, we obtained the equation that described a relationship between inclusion complexation and cloud point. We used the equation to fit the experimental data. We obtained inclusion constant Keq and Tc0.

Related Dissertations

  1. Construction of Multi-responsive Gene Vector Via Layer-by-Layer Assembly,TB383.1
  2. Atomic Absorption Spectrometry Determination of Pb、Cu、 Zn、Cd、Se in Red Wine,TS262.6
  3. Study on the Inclusion Behavior of Flavone-Cyclodextrin Supramolecular System by Spectroscopy,TQ461
  4. The Study of Multi-equilibrium and Kinetics in the Adsorption Processes,X703
  5. Application Research on Environmental Pollutants with High Performance Liquid Chromatography,X502
  6. Study on Determination of Trace Copper, Cadmium , Zinc in Food Samples by Flae Atomic Absorption Spectrometry After Liquid-Liquid Extraction,TS207.51
  7. Analysis of Sulfonamides in Milk by Cloud Point Extraction and High Performance Liquid Chromatography,S859.84
  8. Study on the Poly[2-(N, N-Dimethyl Amino)Ethyl Methacrylate]/Polysulfone Inside-Flow Positively Charged Hollow Fiber Composite Nanofiltration Membrane,TB383.2
  9. Inclusion Properties of Cyclodextrin and Calixarene and Their Pharmaceutical Application,R94
  10. Preparation and Electrochemical Sensor Application of Ferrocene and Its Derivatives Modified Electrode,O627.81
  11. Cloud-Point Extraction and Its Application to the Separation/Preconcentration and Speciation of Metal Ions,O658
  12. Phenyl Polyhedral Oligomeric Silsesquioxane (POSS)-containing Polymers: Structure and Properties,TB324
  13. Cyclodextrin / Inclusion Behavior of natural medicine ; synthesis and biological activity of aza- fused ring indole and aryl enamine ketone / ester,O621.25
  14. Supramolecular Hydrogels and Macromolecular Self-assembly Based on the Inclusion Complexation Interactions,O631.3
  15. Effect of Hydrogen-Bonding on the Interfacial Behavior of Polymer Chains,O631.3
  16. Studies on the Surface Modification of Polymeric Vesicles and Supramolecular Hydrogels Based on the Inclusion Complexation Interactions,O631.3
  17. Fabrication and Functionalization of Responsive Supramolecular Polymeric Assemblies,O631.3
  18. Self-assembly of Inorganic Nanoparticles and/or Macromolecules Driven by Host-Guest Inclusion Complexation,TB383.1
  19. Synthesis and Recognition of New Calixarenes Compounds, and Study of Several Absorbent Resins,O625.1
  20. The Study of Novel Chiral Selector Based on Chelate-inclusion Duel Interaction by CE,R917

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