Dissertation > Excellent graduate degree dissertation topics show

Study on Preparation and Properties of Waterborne Epoxy Emulsion Modified by Silane Coupling Agents

Author: LuHanQing
Tutor: GuoWenLu
School: Jiangsu University of Science and Technology
Course: Applied Chemistry
Keywords: epoxy emulsion silane coupling agent grafting property
CLC: TQ630.4
Type: Master's thesis
Year: 2012
Downloads: 64
Quote: 0
Read: Download Dissertation

Abstract


Based on environmental protection and sustainable development, the research processof anti-corrosion coatings can be summarized as two trends: the "greening" developmentand "high performance" development. Waterborne coatings has accounted for a considerableproportion of anti-corrosion coatings and develop rapidly, especially in the architecturalcoatings field. Practice has proved that two-component waterborne epoxy coatings can meetthe requirements of the heavy anti-corrosion coatings.The particle size of epoxy resinemulsion modified through chemical method can be nm-class. The focus of research is usingdifferent modified agent to meet the different needs.Unsaturated acids resin has the prominent advantages of high gloss and good weatherresistance while organic silicone resin has the excellent advantages of good heat resistance,chemical resistance, water resistance and flexibility. These two resins can be complementarywith epoxy resin so as to prepare the modified waterborne epoxy emulsion which showsexcellent performances. It has great value both in theory and practical application.In this paper, epoxy emulsion was successfully synthesized by grafting MAA, BA andSt, and modified by siliane coupling agent.The course of reaction and the rates of reactors were studied. The optimum reactionconditions was that epoxy resin E-06react as main body, n-butyl alcohol and ethyleneglycol butyl ether react as cosolvent, benzoyl peroxid react as initiator, the optimum amountof initiator was6%~8%, the best grafted temperature was110~115℃, the best grafted timewas5~6h, the best ratio of grafted monomer with epoxy resin was4:5, the amount ofmethacrylic acid was25%, the neutralization degree was90~100%, the salt temperature was55℃, the optimum content of silane coupling agent was7%and the best ratio of KH570with KH550was2:1.The results were characterized by using nanometer particle size analyzer, infraredspectrometer, UV-vis spectrophotometer, electrochemical workstation, contact angleanalizer and thermogravimetric analyzer. The laser particle size analysis showed that theaverage particle size belongs to nanometer level. The structure of epoxy emulsion modifiedby unsaturated acids and silane coupling agent was characterized by FT-IR and the resultsshowed that organosilicon compound had been grafted sucessfully by solutionpolymerization. UV-vis spectrum showed the ultra-violet resistance of modified emulsion increased dramatically. The results of EIS showed the modified epoxy emulsion hadexcellent anti-corrosion properties. The results of contact angle showed the film scantywater rate significantly increased. The results of TG showed after20%weight loss, thethermal stability of modified emulsion was better than pure epoxy resin, emulsion thermalstability obviously improved. The performance test showed that the film owned excellentperformance and flexibility had been improved.

Related Dissertations

  1. Optimizition of Compositions and Processing Parameters and Wear Properties of Cemented Carbides YG11R Modified by Nanosized Rare Earth,TG135.5
  2. Resource Collection and Vegetative Propagation Technique Studies on Ilex Species,S184
  3. Effects of Organic, SEQ, Special and Conventional Farming Systems on the Yield and Quality of Different Vegetables and Soil Properties,S63
  4. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  5. Studies on Shoot Treating and Top Grafting Technique for Replacing Cultivar of Pear Tree,S661.2
  6. Research on Container Nursery and Grafting Techniques of Carya Illinoensis,S664.1
  7. Effects of the Double-Stock Grafting on the Physiological Characteristics, Yield and Quality of Cucumbers,S642.2
  8. Effects of Different Rootstock Grafting on Yield, Quality and Seedling Calcium Chloride Tolerance in Tomatoes,S641.2
  9. Of school-run enterprise property right system of innovative research and standardized management,F271
  10. Expression, Purification and Characterization of Trucated Type Recombinant Buckwheat Trypsin Inhibitor,R284.1
  11. Nano LaFeO 3 Controllable Synthesis and TiO 2 bridged construct composite photocatalyst,O643.36
  12. Effect of Different Resin Cements and Silane Coupling Agents on Bond Strength of Glass Fiber Post to Root Dentin,R783
  13. Discussion of Real Estate Transactions Made in Good Faith in the System,D923.2
  14. Research on the Gansu Provincial Intellectual Property Strategy and Performance Evaluation,F204
  15. The Research of the Medium-sized and Small Property Insurance Companies’ Profitability Promotion Strategy in China,F842.3
  16. Design, Synthesis and Property Studies of Functionalized Crown Ethers,O621.3
  17. Study on Legal Issues of Houses with Limited Property Rights,D922.3;F293.3
  18. On the Study of Improving China’s Official Property Declaration System,D922.1
  19. Preparation and Surface Modification of Silica Nanoparticle,TB383.1
  20. Properties on the Collar of A Noun Phrase Split Shift,H146
  21. Modern Russian nature and functions of semantic categories of,H35

CLC: > Industrial Technology > Chemical Industry > Paint Industry > General issues > Raw materials and auxiliary materials
© 2012 www.DissertationTopic.Net  Mobile