Preparation of Narrow- or Monodisperse Polymer Microspheres with Active Hydroxyl Group by Distillation-precipitation Polymerization
writer：Feng Bai, Rui Li, Xinlin Yang*, Shuning Li, Wenqiang Huang*
keywords：divinylbenzene; ethyleneglycol dimethacrylate; hydroxyethyl methacrylate; monodisperse microspheres;
source：期刊
specific source：Polym. Int., 55(2), 319-325 (2006). DOI: 10.1002/pi.1963
Issue time：2006年
Narrow-dispersion or monodisperse polymer microspheres with active hydroxyl groups were prepared by distillation–precipitation polymerization in the absence of any stabilizer. The monomer hydroxyethyl methacrylate (HEMA) was copolymerized with either commercial divinylbenzene (DVB) (containing 80 % of DVB isomers) or ethyleneglycol dimethacrylate (EGDMA) as crosslinker by distillation–precipitation polymerization technique with 2,2-azobisisobutyronitrile (AIBN) as initiator in neat acetonitrile. The effects of the crosslinker and the crosslinking degree on the morphology and the loading of the active hydroxyl group of the resultant microspheres were investigated. The agitation caused by distilling off a portion of the polymerization solvent during the polymerization avoided coagulation and
resulted in the narrow-dispersion or monodisperse polymermicrospheres for the distillation precipitation technique.