The Study Of Polymerization Of CO And Styrene Catalyticed By PANI/Pd(Ⅱ)

The research of polyketide(PK), which is obtained by alternating copolymerization of olefins and Carbon monoxide, not only can make full use of CO, but also ease the shortage of oil resources, at the same time can reduce the pollution of the environment, thus becoming one of the central issues in the stage of the research and development of polymer materials. In this paper, we take polyaniline as the carrier to be loaded with palladium chloride to form a palladium catalyst system, which can be used in the polymerization of styrene and carbon monoxide, then we make a fully analysis of the catalyst activity and product structure. At the same time, in order to provide some basic data and theories for its future research and industrialization, we conduct a preliminary investigation of synthesis kinetics of the copolymerization between styrene and CO as well as the kinetics of thermal decomposition about the polyketide.. The main content of this paper is as follows:(1)The synthesis method of polyaniline is chemical oxidation synthesis and we should analysis some different conditions which can affect catalytic activities, such as the preparation media of polyaniline and the load media of catalyst, then we get a better preparation condition of catalyst:CCTAB=0.004mol/L;PH=5,and the best catalytic activity is25.68gPK/gcat.h.(2)Take single factor and orthogonal experiments on the polymerization conditions such as reaction pressure、reaction temperature、reaction time and amount of catalyst so as to determine the optimal reaction conditions, and the optimum reaction conditions are:T=75℃、P=3.0Mpa、t=2h、m=0.33g, the catalytic activity in Under suitable conditions is gPK/gcat.h.(3)We put a preliminary investigation of the catalyst’s microstructure and morphology using SEM、TEM、TG、DTG、XRD、UV-vis and so on, combined with the catalytic activity, to study the relationship between catalyst activity and its structure and morphology.(4)Based on the variation of pressure versus time about the synthesis of polyketide, we study the macroscopic dynamics in the synthesis of polyketide in different catalytic systems.(5)We adopt the infrared absorption spectroscopy (FT-IR) and nuclear magnetic resonance (NMR) to analysis the structure of the polyketide, and take a thermal degradation kinetics analysis of the polyketide which prepared by catalyst of pure sodium chloride and supported catalyst according to the analysis methods of TGA and DTG. Then we find out that the thermal stability of polyketide prepared by the supported catalyst is better, at the same time we obtain the polyketide decomposition activation energy using the differential method and the integration method.