Dissertation > Excellent graduate degree dissertation topics show

Catalysts for Synthesis of Poly (Trimethylene Terephthalate) by Direct Esterification

Author: LiuZhiJun
Tutor: HeChongHeng
School: East China University of Science and Technology
Course: Chemical processes
Keywords: poly(trimethylene terephthalate) catalyst stannous oxalate stannous malonate stannous succinate
CLC: TQ316.31
Type: Master's thesis
Year: 2012
Downloads: 30
Quote: 0
Read: Download Dissertation

Abstract


Poly(trimethylene terephthalate) is a relatively new semicrystalline thermoplastic polyerster. As its excellent performance, this polymer has been widely used in the fiber and engineering plastic areas. However, the local production of PTT doesn’t go well, due to the intrinsic viscosity of the PTT is not high as been used for spinnings. The viscosity of PTT has relation with catalysts, reaction conditions, reactors and so on. Among these, the catalyst is the key factor. Therefore, two types of catalysts were designed, prepared and used as catalyst for the PTT synthesis in this paper.The first type is organic tin catalyst, such as stannous oxalate, stannous malonate and stannous succinate, which are prepared by stannous chloride and the corresponding acids. The catalysts were characterized by FT-IR and NMR. The results of experiment show that the yield of stannous oxalate is higher than others. The reason may be that malonic acid and succinic are not easily form coordinating bond between acid and tin ion, with structure of the flexible methylene, leading to a larger space resistance. These catalysts for PTT synthesis have some activities, but the activities are not high enough.The second type is composite catalysts, such as SnO2-SiO2 complex and SnO2-TiO2 complex, which are prepared by flame hydrolysis. The catalysts were characterized by SEM. The performance of composite catalysts for PTT synthesis was also investigated. The experiment results show that two types of catalysts for PTT synthesis have activities. But it lower than organic tin catalysts.In addition, the effection of catalyst amount, ratio of PDO/PTA, reaction temperature etc. on the reaction rate of esterification and performance of the PTT were also investigated.

Related Dissertations

  1. Study on the Procees for the Preparation of Prohexadione and Its Analogs,TQ452
  2. Study on Using Sepiolite As Supported Catalysts in Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol,O643.32
  3. The Preparation of Polyaniline-Metal Complex and the Study on Its Catalytical Property,O634
  4. Synthesis and Characterization of Monovalent, Divalent Imidazolium Ionic Liquids Containing Hydrocarbons,O621.3
  5. Pt -based catalysts of direct methanol fuel cells,TM911.4
  6. The Study of Anode Catalyst Pd/C for Direct Formic Acid Fuel Cell,O643.36
  7. Study on the Synthesis of the Polypyrrole-Cobalt Oxides and Their Catalytic Behavior for the Electroreduction of H2O2,O643.32
  8. The Basicity of MO/ZrO2 Catalyst and Their Use in the Synthesis of 2-Ethyl-Hexyl Carbonate,O623.662
  9. Application of Charcoal Loaded Catalyst for Treatment of Organic Pollutants,X703
  10. Controllable Synthesis of Carbon Nanotubes Supported Metall Nanocatalysts and the Study on Their Electrocatalysis,O643.36
  11. Synthesis of 1,4-Butynediol from HCHO and C2H2 Over CuO-Bi2O3/MgO-SiO2,TQ223.162
  12. Research on Fuel Gas Production from Catalytic Gasification of Municipal Solid Wastes,X799.3
  13. PtRh / Pt 5 / C Catalyst Preparation, Characterization and Electrocatalytic Oxidation of Ethanol,TM911.4
  14. Epoxidation of olefins with high activity cobalt zeolite catalysts,O643.32
  15. MCM-41 as aryl oxime palladium catalyst and catalytic Suzuki coupling reaction of aryl,O643.36
  16. Nano Pt / SiC Preparation, Characterization and Electrochemical Catalytic Performance,TM911.4
  17. Synthesis of t- butyl alcohol using tert-butylbenzene, the catalyst selection and research,TQ241.1
  18. Synthesis and Responsive Behavior of Amphiphilic Azobenzene Functionalized Block Copolymers,O631.3
  19. Study on Potassium Catalyst Recovery of Coal-Steam Catalytic Gasification,TQ546
  20. Research of Ni-Based Catalysts for Hydrogen Generation from NaBH4 Hydrolysis,O643.36
  21. Catalytic Study of Hydrogen Peroxide Synthesis Directly from H2 and O2,TQ123.6

CLC: > Industrial Technology > Chemical Industry > Molecular compound Industries ( polymer industry ) > Production process > Polymerization process. > By energy sub-
© 2012 www.DissertationTopic.Net  Mobile