Dissertation > Excellent graduate degree dissertation topics show

Study on New UV Curing Liner in High Energy Solid Rocket Engine

Author: ZhangMoHan
Tutor: DengJianRu
School: Hunan University
Course: Chemical Engineering and Technology
Keywords: High Energy Solid Rocket Engine Liner UV Curing MechanicalProperty Swelling Property
CLC: V435
Type: Master's thesis
Year: 2012
Downloads: 8
Quote: 0
Read: Download Dissertation


The liner is an adhesive interlayer between the propellant and the thermalinsulation layer or case, and the adhesion of its interface will directly affect thestructural integrity and functional reliability of the rocket engine. Nitrate esterplasticized polyethylene (NEPE) propellants contain large numbers of nitroglycerinsand other nitrates. During the process of pouring, curing and storage of the propellant,the small molecules of nitrates can easily migrate to the surface of the propellant andbe absorbed by the liner, which results in the debond between the liner and propellantgrain, leading to the rocket failure. Therefore, developing a high-performance liningmaterial applied to NEPE propellants is a vital task for researches on the solid rocketengine. Based on the current situation of the use of liner, the study intends to applyingUV curving technique to the liner, preparing a new liner with UV curving activitythrough optimization of formulation and synthetic technique, which has a goodmechanical property while effectively reducing the migration of nitrates.The study synthetizes a kind of base resin using the polyurethane acrylate as theUV curving liner according to the requirements of the use of liner and the relationbetween structure and property of polyurethane. Through discussion of raw material,reaction time and synthetic process, synthetic technological conditions of the baseresin are obtained: the first step is to synthesize a prepolymer terminated by isocyanateat80℃constituted by hydroxyl-terminated polybutadiene (HTPB),1,4-butanediol andisocyanate; the second step is to introduce photoactive groups through addingmeasured hydroxyethyl acrylate at70℃, which is catalyzed by0.1%dibutyltindilaurate in the reaction process.The study synthesizes a series of different molecular structures of linear baseresins with different diisocyanates, discusses the effect of the isocyanate component,curing parameter as well as the hard segment content on the mechanical property andswelling property of the UV curing liner, and obtains a formulation of the base resinwith relatively optimal comprehensive property: using2,4-toluene diisocyanate as theisocyanate component with the curing parameter of1.22and the hard segment contentof30%; determining the UV curing system through investigating the UV curing time,photoinitiator and coating solvent: Using Photoinitiator1173with the dosage of3%ofthe mass of the base resin and methylbenzene as the coating solvent, UV curing time being about20s.The study explores the application property of UV curing liner with the optimalformulation, which has a good adhesion with the thermal insulation layer and HTPB. Itverifies that the liner can better inhibit the migration of nitrates through swellingproperty comparison with the conventional thermal curing liner.

Related Dissertations

  1. Study on the Molding Process of Three-dimensional Non-woven Bra Cup,TS941.4
  2. Modifed Research of UV Coatings,TQ637
  3. Development of Cr-Mo Alloy Steels for Liner Applications and Assessment of Its Wear Resistance,TG335.5
  4. Synthesis and Performance Study on UV-curable Polyurethane Acrylate,TQ630.43
  5. Fuzzy Trigeminal Tree Fricing Model of Real Options and Its Application,F830.59
  6. Study on Influence of α-Aminoketone Photo-initiator to UV-heat Dual Curing of Filled Epoxy Acrylate/epoxy Resin System,TQ323.5
  7. Study of Expandable Tubular Well Completion Technology in Tarim Oil Filed,TE257
  8. The Influence of Probe Wanering to Testing Sheet Resistance of Large Silicon and Research on Simulation Technology,TN307
  9. Application of a Novel Cationic light curing system,TQ630.1
  10. Study and Application of Multifunctional Thermal Insulation Energy-saving Coating,TQ637
  11. Synthesis and Applications of UV-curing Polyurethane Acrylates Emulsion,TQ323.8
  12. Research on the CNC of the Middle-convex and Varying Piston Processing,TG659
  13. Modification of cellulose acetate butyrate and UV-curable coatings,TQ630.4
  14. Research on the Heat-resistant UV Curable Waterborne Polyurehane Coatings,TQ630.7
  15. Single-plane Cable-supported Glass Curtain Wall Structure Performance Analysis,TU399
  16. Study on the UV-Curing Coating Materials of Release Papers,TQ630.7~9
  17. Synthesis and Properties of Hybrid UV-Curable Resin,TQ323
  18. Fundamental Research on Production Technology of Vermicular Cast Iron Cylinder Liner with Centrifugal Casting,TG250
  19. The Synthesis and Research of Cationic Photoinitiator-diphenyliodonium Hexafluorophosphate,O621.3
  20. Synthesis of Copolymerizable Photoinitiator Used for UV Curing Systems,TQ314.241
  21. Based on The BTEA the UV- curable waterborne polyurethane synthesis and properties of,TQ323.8

CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Propulsion system ( engine, propeller ) > Solid propellant rocket motor
© 2012 www.DissertationTopic.Net  Mobile