Study On Catalysis And Synthesis Technology Of Multifunctional Polycarbonate Material

Facing the environmental pollution and energy shortage, it needs to explore the green synthesis method for polymer and to realize recycling and renewable using for polymer materials. The copolymerization experiments of carbon dioxide (CO₂) and propylene oxide (PO) using modified zinc-containing catalyst systems were investigated in this paper. This study will promote the ring-opening copolymerization research for the epoxide and is a reasonable effective way of using CO₂. The recent progress in the research of a reaction in supercritical CO₂, the copolymerized monomer with CO₂ and a catalyst study for copolymerization of CO₂ with propylene oxide had been reviewed. In the experiment the new-type catalysts for copolymerization of CO₂ and PO improved the catalytic efficiency.The prepared Ti, Zr, V, Mo-modified zinc-containing catalysts were compared with zinc glutarate catalyst. And the modified zinc-containing catalysts were characterized by IR, XRD, XPS, SEM, respectively. The evaluation and analysis for the catalysts were made basing on the characterized information.The autoclave reactor with an electric-heater and a mechanical stirrer was designed and installed. The temperature was determined and controlled by thermocouple sensor which had been precisely calibrated. The experiment results of synthesis poly-propylene carbonate (PPC) were analyzed by orthogonal design. And the optimization reaction condition of synthesis was obtained. The PPC was determined by IR, 1H-NMR, 13C-NMR. It was confirmed that the PPC had an alternating copolymer structure together with high molecular weight.The catalytic efficiency of different catalysts was compared in the experiment. The influences of reaction condition include reaction time, temperature, pressure and the amount of catalyst for the copolymerization had been discussed. High catalytic efficiency was achieved by the modified zinc-containing catalysts. Their reaction temperature and the pressure higher than zinc glutarate catalyst, but the reaction time was lower than it. The modified zinc-containing catalysts would obtain the polymer with high molecular weight in a litter time. It can not only enhance the chemical fixation amount of CO₂, but also can improve the performance of PPC.