writer：Cai-li Yu, Xiaolei Wang, Chuanwei Chen, Faai Zhang
keywords：rosin; rosin acrylic; rosin ester; styrene; suspension polymerization; polymer microspheres
source：期刊
specific source：industrial and engineering chemistry research
Issue time：2014年
Reacting acrylic rosin with 2-hydroxyethyl methacrylate (HEMA) produced an ester (RAH) with double bonds that was used as a crosslinking monomer for preparation of polystyrene microspheres via suspension polymerization, replacing the traditional monomer divinyl benzene. The effects of monomer weight ratio, reaction temperature, gelatin level, and stirring speed on the polymer microspheres were investigated. The structures, morphology, and properties of the polymer microspheres were analyzed and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, optical microscope, and laser particle size analysis. The results indicated that the polymer microsphere with the best spherical shape were prepared with a monomer weight ratio of m_St:m_RAH = 2:1, with azodiisobutyronitrile and gelatin in the amount of 1 and 6 wt.% of total monomers,. The particle size of the polymer microspheres varied with the reaction conditions.