Copolymerization Of Anethole And Maleic For Preparing Microspheres:Preparation And Applications

P-methylstyrene derivatives, a group of biomass existing widely in the essential oils of spices, are common compounds to be found in the nature. The ?-methylstyrene derivatives have been widely applied in food additives, food preservation, pharmaceutical and chemical synthesis. However, because of the difficulty in polymerizing P-methylstyrene derivatives, the application of them in polymer synthesis is limited. Maleic anhydride can be easily copolymerized with many monomers, and the resulting copolymers are also easily to be further functionalized. Furthermore, maleic anhydride-based copolymers have been extensively applied in the preparation of dispersant, adsorbent, scale inhibitor and so on. This thesis used a typical ?-methylstyrene derivative monomer, i.e. trans-anethole, as a copolymerization monomer with maleic anhydride to prepare poly(/rans-anethole-co-maleic anhydride) [poly(ANE-co-MAH)] copolymer. Accordingly, the polymer microspheres were prepared by precipitation polymerization, and the low molecular weight copolymers were prepared by solution polymerization. The influence of reaction conditions on products was investigated. The products were applied as adsorption, dispersion or antimicrobial material, so that the application range of P-methylstyrene derivates may be extended. The main work is as follows:1. The poly(ANE-co-MAH) copolymer microspheres were prepared with AIBN as initiator and mixture solvent of methyl ethyl ketone and n-heptane as solvent medium. After adjusting and optimizing the experimental conditions, the microspheres with optimal morphology and narrow size distribution were prepared. The crosslinked poly(ANE-co-MAH) microspheres were prepared under the optimal conditions, in the presence of crosslinking agent DVB, then the hydrolyzed polymer microspheres were prepared by surface hydrolysis of the crosslinked microspheres. The adsorption properties and the relevant adsorption mechanism on Cr(?) and methyl red were investigated by using the hydrolysis microsphere. The results demonstrated the adsorption capacity of the microspheres on Cr(?) (10.8mg/g) and methyl red (17.6mg/g), indicating the potential value of poly(ANE-co-MAH) microspheres for wastewater treatment.2. Low molecular weight poly(ANE-co-MAH) copolymers were prepared by solution polymerization. By optimizing the experimental formula, poly(ANE-co-MAH) copolymers with low molecular weight and narrow distribution can be prepared. The copolymer with molecular weight of 3300 and molecular weight distribution of 2.0 was applied as particle dispersant and antibacterial agent. The copolymers showed certain dispersion and antibacterial abilities, but relatively lower than commonly used dispersants and antibacterial agents. The results showed that after optimization in structure, composition, and properties, the copolymers with low molecular weight has potential applications as dispersant and antibacterial agent.