ie402868y_si_001.pdf (250.61 kB)
Preparation of Polystyrene Microspheres Using Rosin–Acrylic Acid Diester as a Cross-Linking Agent
journal contribution
posted on 2014-02-12, 00:00 authored by Cai-li Yu, Xiaolei Wang, Chuanwei Chen, Faai ZhangReacting acrylic
rosin with 2-hydroxyethyl methacrylate (HEMA)
produced an ester (acrylic rosin ester, RAH) with double bonds that
was used as a cross-linking monomer for the preparation of polystyrene
microspheres through 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, morphologies , and properties of
the polymer microspheres were analyzed and characterized by Fourier
transform infrared spectroscopy, scanning electron microscopy, thermogravimetric
analysis, optical microscopy, and laser particle size analysis. The
results indicated that the polymer microspheres with the best spherical
shape were prepared with a monomer weight ratio of mSt/mRAH = 2:1, with azodiisobutyronitrile
and gelatin in the amounts of 1 and 6 wt % of total monomers. The
particle size of the polymer microspheres varied with the reaction
conditions.