Narrowdisperse poly(divinylbenzene-co-Nisopropylacrylamide) (poly(DVB-co-NIPAM)) functional microspheres with the diameter in the range of 630 nm and 2.58 mu m were prepared by distillation-precipitation polymerization in neat acetonitrile in the absence of any stabilizer. The effect of N-isopropylacrylamide (NIPAM) ratio in the comonomer feed on the morphology of the resultant polymer particles was investigated in detail with divinylbenzene (DVB) as crosslinker and 2,2-azobisisobutyronitrile (AIBN) as initiator. The monodisperse poly(DVB-co-NIPAM) microspheres with NIPAM fraction of 20 wt % were selected for the preparation of raspberry-like core-corona polymer composite by the hydrogen-bonding self-assembly heterocoagulation with poly(ethyleneglycol dimethacrylate-co-acrylic acid) [poly (EGDMA-co-AA) nanospheres. Both of the functional poly (DVB-co-NIPAM) microspheres and the core-corona particles were characterized with scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR), and elemental analysis (EA). (c) 2007 Wiley Periodicals, Inc. J Appl Polyro Sci 104: 1350-1357,2007.