Abstract
In the present work, polyketone (STCO) was successfully synthesized by use of carbon monoxide (CO) and styrene (ST) in the presence of Pd/C (5.4 wt%), bipyridine and p-toluenesulfonic acid. The final products were characterized by infrared Spectroscopy (IR), 13C nuclear magnetic resonance ( 13C NMR), elemental analysis, thermogravimetry (TG), differential scanning calorimetry (DSC), gel permeation chromatography (GPC) and transmission electron microscopy (TEM). The effects of various reaction conditions, including Pd/C catalyst usage, ligands, p-toluenesulfonic acid, reaction temperature and reaction time were investigated in detail, and the reusability of Pd/C catalyst in the copolymerization of CO and ST was also probed. It is found that the Pd/C catalyst shows higher catalytic activity and reusability in the copolymerization of CO and ST. It can be reused for 12 times with the highest catalytic activity of 1255.17 STCO/(g Pd h). The molecular weights and polydispersity index of the polyketone were as follows: Mn = 10,700, Mw = 19,079 and Mw/Mn = 1.78, respectively.
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