writer：Caili YU1, Chuanwei CHEN1, Qinhai GONG2, Faai ZHANG*2
keywords：Polymer microsphere; Rosin ester; Styrene; Orthogonal experiment
source：期刊
specific source：Polymer International
Issue time：2012年
Rosin was reacted with hydroxyethyl methacrylate to produce a macromonomer. This macromonomer was used to replace styrene partly for the novel preparation of polymer microspheres with divinylbenzene via suspension polymerization. Orthogonal experiments were conducted to analyze the factors influencing the particle size, particle size distribution, swelling ratio, and degree of crosslinking of the polymer microspheres. Fourier transform infrared spectroscopy, thermogravimetric analyses, and scanning electric microscopy were used to examine the structures, thermal properties, and morphologies of the polymer microsphere, respectively. The results showed that the amount of dispersant had the greatest influence on particle size and distribution. On the other hand, the monomer ratio greatly influenced the swelling ratio and degree of crosslinking of the polymer microspheres. The most decomposition temperature of the polymer microspheres increased upon the introduction of  rosin moiety into the product. Open pores were abundant on the surface of the polymer microsphere due to the existence of porogen, which provided a base for adsorption and separation. The present study opened a novel route for using naturally occurring rosin.