Synthesis And Property Characterization Of Magnetic Polymer Microsphere And MCS Resin

In the first part of this paper, magnetic particle Fe304 was synthesized by coprecipitation by dispersion agent polyethelene glycol (PEG). The effect of PEG content and agitator speed on magnetic particle Fe304 diameter was investigated. The magnetic polymer microspheres, having magnetic core and polymer shell, have been synthesized by dispersion copolyrnerization of styrene (St), methacrylate (MA) in the presence of Fe304 modified by PEG. The polymer microspheres, those diameter ranged from 5 to 150 t m, possess good magnetic induction, and can be separated from dispersion medium under magnetic field. The mass magnetic susceptibility and content of Fe304 in the microspheres can be controlled in different polymerization condition. It is shown that PEG, dispersion medium has great effect on the diameter and dispersion parameter of microspheres. The magnetic microspheres and aminated microspheres were used to absorb phenol in solution. The effect of phenol concentration and absorption time on absorption quantity was investigated. The result was shown that the absorption quantity increased with the increasing phenol concentration and absorption time. In the second part of this paper, the bipolymer (P SM) and terpolyrner (PSMEA, PSMIMS) was synthesized by emulsion polymerization. The glass transition temperature (Tgs) of copolyrners and relationship between Tg with components were studied by differential scanning calorimeter (DSC). The results show that TgS of bipolymer have a peak value at about the content of 50%MMA (in wt). When the a MSt was added, TgS of terpolyiner raised with the increasing content of a -MSt, while TgS of tercopolyrner decreased with the increasing content of EA. The therrnostability was determined by thermogravimetric analysis (TGA). The rheological behavior of copolyrner was investigated. The results show the apparent viscosity ri a of terpolymer in melt was dropped as the content of a -MSt or EA increasing and it is the behavior of pseudoplastic liquid. SUM micrographs shown containing a -MSt or EA terpolymers have a good compatibility. MCS resin formed from methyl methacylate (MIN扞A), styrene (St), chlorinated polyethylene (CPU) was synthesized by suspension swelling graft-copolymerization. The synthesis conditions of MCS, the effect of different synthesis conditions on graft efficiency, the mechanical property, rheological behavior and morphology were investigated. The graft efficiency increased with increasing CPE content. The apparent viscosity of melt increased with increasing the content of CPE.