Dissertation > Excellent graduate degree dissertation topics show

The Preparation and Properties of Modified Polyurea Elastomer

Author: AnPingPing
Tutor: MiJianGuo
School: Beijing University of Chemical Technology
Course: Chemical Engineering and Technology
Keywords: Spray polyurea elastomer Carbon nanotubes Nanocomposites Surface Modification Mechanical behavior
CLC: TQ334
Type: Master's thesis
Year: 2011
Downloads: 68
Quote: 0
Read: Download Dissertation

Abstract


Polyurea elastomer is a isocyanato prepolymer and the amino compound obtained in the polymer having a urea bond. It has excellent anti-corrosion, wear-resistant, anti-slippery excellent physical and chemical properties. Polyurea elastomer modified the study, the main contents include: spray polyurea elastomer bubble problem in the construction of the production process, the use of chemical and physical methods for defoaming, detection, defoaming polyurea elastomer performance improved significantly. In order to improve the the polyurea elastomer performance and to expand its range of applications, a single breakthrough material limitations, in situ polymerization of carbon nanotube / polyurea elastomer nanocomposite excellent use of carbon nanotubes The mechanical properties of polyurea elastomer to compensate for deficiencies in this regard. The first mixed acid oxidation prepared the the hydroxylated carbon nanotubes, carboxylated carbon nanotubes in the the hydroxylated carbon nanotube surface grafted polyacrylic acid esterification. The carboxyl carbon nanotubes surface carboxyl and excessive the terminal amino polyether D400 reaction amino carbon nanotubes. After FTIR, TG, XPS test shows that carbon nanotubes was successfully grafted amino. Ultrasound shock, two kinds of carbon nanotubes, the original carbon nanotubes and amino nanotubes mixed polyether curing agent of the mixture with the terminal amino group, and then, and the iso-cyanate prepolymer is prepared by reacting a polyurea elastomer composites . After gel content measurement, tensile test and the composite material broken brittle surface SEM shows that amination nanotubes can be uniformly dispersed in the polyurea elastomer matrix, and the amino-modified nanotubes polyurea elastomer compound the tensile strength is increased with increasing the amino content of carbon nanotube, the carbon nanotube content of 0.7 wt%, the maximum value was 58.7 MPa, pure polyurea elastomer resin increase of 40% . The original carbon nanotubes polyurea elastomer matrix easy to reunite the original carbon nanotube modified polyurea elastomer tensile strength decreases with increasing nanotube content. Because the amino group of the amino surface of the carbon nanotube with the isocyanate-reactive form of a covalent bond is connected to the molecular chain of the polyurea elastomer, and enhance the interfacial adhesion of the carbon nanotubes and the base body. Polyurea Elastomers amino-modified carbon nanotubes, has been significantly improved.

Related Dissertations

  1. Preparation of Crop Stalk-Based Sorption Materials with High Performances and Their Applications for Pah Removal from Water,X712
  2. Synthesis and Biocompatibility of different types of hydrophilic surface - modified polyurethane,R318.08
  3. Carbon Nanotubes Compound Polymer Film Modified Electrode and Its Application for Electroanalytical Chemistry,O657.1
  4. Polyaniline / short fiber reinforced natural rubber properties,TQ330.1
  5. Phosphate modification of nano- TiO 2 Photoelectrochemical Properties of the,TB383.1
  6. SnO 2 / CNTs composite Controllable Preparation and Gas Sensitivity Study,TB383.1
  7. MWCNTs and ZnO / SnO 2 Composites and NO gas research,TB33
  8. Poly(L-lactide) Nanocomposites Containing Octaglycidylether Polyhedral Oligomeric Silsesquioxane: Prepartion, Structure and Properties,R318.08
  9. Construction of Multi-responsive Gene Vector Via Layer-by-Layer Assembly,TB383.1
  10. Preparation and Characterization of Multifunctional Fe3O4/ZnO/SiIO2 Nanocomposites,TB383.1
  11. Synthesis of Silver Nanoparticles on Modified Multi-walled Carbon Nanotubes and Their Antimicrobial Effects,TB383.1
  12. Study on Laser Surface Modification of Two Kinds of Super-alloys,TG174.4
  13. Preparation of Functional Multi-walled Carbon Nanotubes for Using in Electrochemical Capacitor Materials and Its Electrochemical Performance,TB383.1
  14. Atmospheric Pressure Plasma Surface Modification of Carbom Fibers and Numerical Simulation of the Discharge,TQ342.742
  15. Preparation and Properties of EVOH/Carbon Nanotubes Composite Micro/Nanofibers,TB383.1
  16. Study on Fiber Laser Welding of Aluminum Alloy with Filler Wire,TG456.7
  17. Study on Modification of PBO Fibers by Atmospheric Pressure Plasma,TS195.6
  18. The Monomer Compoment and Fillers Microstructure Effect on the Properties of Dental Resin Composites,R783.1
  19. Surface Modification of Poly (ε-caprolactone)s and Its Influence on Cell Behaviour,R318.08
  20. Study on the Structure and Property of Polycaprolactone/Chitosan Nerve Conduits,R318.08
  21. Stainless steel fuel cell bipolar plate and its experimental and simulation,TM911.4

CLC: > Industrial Technology > Chemical Industry > Rubber Industry > Thermoplastic elastomers
© 2012 www.DissertationTopic.Net  Mobile