Palladium-catalyzed Carbon Monoxide And Ethylene Synthesis Of Polyketide Process

With the development and application of new technology, various new polymeric materials have developed quickly and been widely applied in people's life. Though they have many advantages, they have brought great pollution to the environment after they are abandoned, so the environment-friendly polymeric materials are favored by the society. Polyketone in this thesis is a polymer material that formed by CO and C2H4 linear alternate copolymerization, through palladium catalyst system and using absolute methanol as solvent. Not only it has excellent physical properties such as high melting point, good mechanical properties, abrasion resistance, chemical resistance, heat resistance, and gases barrier properties, but also a large number of carbonyl exiting in its major chain of polyketone endow it with excellent light biodegradability. The main sources of polyketone are extensive, so using CO in yellow phosphorus exhaust as raw materials has the advantages of the cost savings and the utilization of waste.With absolute methanol as solvent, Pd(AcO)2DPPP as a catalytic precursor, concentrated sulfuric acid as catalyst, benzene quinone as oxidant, carbon monoxide and ethene are copolymerized catalytic reaction. Polyketide molecular weight of 24944, melting point 256 degrees. This thesis emphasis on how the dosage of the components of catalytic system (including phosphorous bidentate ligands, acid, cocatalyst) and copolymerization reaction conditions (copolymerization reaction temperature, pressure and stirring speed, etc.) influence the catalytic activity of reaction, and explores the rules of solution polymerization reaction. It determines the appropriate catalytic system:DPPP:Pd=1.5:1, H2SO4:Pd=100, p-benzoquinone:Pd=60. Polymerization process conditions:stirring speed for 400r/min, palladium catalyst concentration for 0.1mmol/L, reaction temperature for 95 degrees, the reaction pressure for 4.0 MPa, CO:C2H4== 1:1.This thesis discussed and analyzed the mechanisms of palladium catalyst CO/C2H4 copolymerization in detail, and combined with the method of concentration in the chemical reaction, generating function as well as the experiment data. It established CO and ethene copolymerized reaction mathematical model under the Pd(AcO)2DPPP catalytic system, and invested the conversion rate of polymerization and polymerization degree of polyketone, tested calculations and experimental values through their models, error no less than 5%, showing that this kinetic model can be a good response of the palladium-catalyzed CO/ethene reaction process.