Synthesis and characterization of silicon-containing hyperbranched polymers via thiol-ene click reaction

Novel hyperbranched organosilicon polymers were successfully prepared via step-growth thiol-ene click reaction using mercaptopropylmethyldiallylsilane (AB 2 ) and mercaptopropyltriallylsilane (AB 3 ) as hyperbranched monomers . The structures of the prepared polymers were characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy . The degree of branching (DB) of the polymers was determined using quantitative 29 Si NMR spectroscopy. The DB of the polymers from AB 2 and AB 3 was 0.60 and 0.22, respectively. The results of thermogravimetric analysis showed that the presence of thioether does not affect the thermal stability of the resulting silicon-containing hyperbranched polymers (Si-HBs). The resulting Si-HBs can be used as promising candidate materials for heavy metal adsorption because of the thioether bond.