| 초록 |
Recently, many researchers have been successful in developing antibacterial and disinfectant agents with silver loaded carriers. In this study, high molecular weight (HMW) poly(vinyl pivalate)/silver nanocomposite microspheres (PVPi/Ag), which are promising precursor of embolic materials with antibacterial ability, were prepared via a suspension polymerization approach in the presence of Ag nanoparticles. It was found that a high yield and HMW PVPi/Ag could be obtained even using a low-temperature initiator 2,2'-azobis(2,4-dimethylvaleronitrile). In the case of presence of Ag nanoparticles, the rate of polymerization was slightly slower than that without Ag. The suspension polymerization approach introduced could produce PVPi/Ag composite with conversion and number-average degree of polymerization up to 90 % and 25,000 respectively, in spite of at low polymerization temperature (~30 oC), in sharp contrast with only ~40% conversion of VPi under bulk polymerization. |
