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Jun Yan,Li Ma,Mengyu Gan,Xiao Li,Zhitao Li,Jihai Tang,Ying Tu,Haifeng Hu 한국고분자학회 2014 Macromolecular Research Vol.22 No.8
In this work, flake-like poly(2,3-dimethylaniline) (P(2,3-DMA)) with enhanced thermal stability andanticorrosive ability was synthesized by in situ polymerization using H2O2/Fe2+ catalytic oxidation system, comparingwith traditional oxidant ammonium persulfate (APS) synthetic method. The structure and morphology of thesamples were characterized Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD) and field-emissionscanning electron microscope (FESEM). The experimental results demonstrated that using H2O2/Fe2+ catalytic oxidationsystem was more inclined to form the two-dimensional P(2,3-DMA) flakes. The enhancement in thermostabilityand corrosion resistance was attributed to the formation of phenazine-like structures in the polymer chains,which could serve as templates to form the flake-like morphology. In addition, using H2O2/Fe2+ catalytic oxidationsystem is more environmental friendly than the APS method that can avoid ammonium pollution on aquatic life aswell as waters.
Zhaoyang Fei,Shenglan Ai,Zhe Zhou,Xian Chen,Jihai Tang,Mifen Cui,Xu Qiao 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
In the present work, tin incorporated MCM-48 catalysts were prepared by different strategies andapplied in the synthesis of MB-AC and MBOH. The performance of the catalysts is strongly affected bymesochannel environment and acid texture. The organic-graft method (Sn-G-MCM-48) can modify themesochannel environment and enhance the acid intensity and concentration (0.28 mmol/gcat),resulting in the improvement of the catalytic activity to the target reactions. The total yield of MB-AC andMBOH is as much as 68.4% over Sn-G-MCM-48 under mild conditions.