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- W3000284805 abstract "Poly(N,N-diethylacrylamide)-based microspheres were prepared by ammonium persulfate (APS)-initiated and poly(vinylpyrrolidone) (PVP)-stabilized dispersion polymerization. The effects of various polymerization parameters, including concentration of N,N'-methylenebisacrylamide (MBAAm) crosslinker, monomer, initiator, stabilizer and polymerization temperature on their properties were elucidated. The hydrogel microspheres were described in terms of their size and size distribution and morphological and temperature-induced swelling properties. While scanning electron microscopy was used to characterize the morphology of the microspheres, the temperature sensitivity of the microspheres was demonstrated by dynamic light scattering. The hydrodynamic particle diameter decreased sharply as the temperature reached a critical temperature ~ 30 °C. A decrease in the particle size was observed with increasing concentration of both the APS initiator and the PVP stabilizer. The microspheres crosslinked with 2-15 wt % of MBAAm had a fairly narrow size distribution. It was found that the higher the content of the crosslinking agent, the lower the swelling ratio. High concentration of the crosslinker gave unstable dispersions." @default.
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- W3000284805 title "Poly(N,N-diethylacrylamide) microspheres by dispersion polymerization Part A Polymer chemistry" @default.
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