Encapsulation Of Solvent Blue Dye Into Polymer By Miniemulsion Polymetization And Preparation Of ABS By Bulk Polymerization

In the first part, AOS was employed as polymerizable emulsifier to prepare nanocolorants by miniemulsion polymerization. TEM, LLS, UV-vis spectroscopy, TGA were used to study the effects of AOS, co-stabilizer, polar monomer and crosslinker on the morphology of nanocolorants. The results showed that nanocolorants possess clear core-shell structure. Particle size decreased with the increase of the concentration of AOS, adding appropriate amount of polar monomer contributes to get clearer core-shell structure. Using crosslinker can increase the crosslinking density of the polymer chains and improve the resistance of dye migration. The study also found that the polar difference between crosslinker and monomer results the rough surface of nanocolorants. Using non-polar St as monomer, only when the concentration of non-polar crosslinker DVB of the monomer concentration is in the range of8.0-30.0wt%could obtain regular structure nanoparticles, but the surface of the nanoparticles is no longer smooth once the concentration of DVB exceeds30.0wt%. However, for the the polar monomer MMA, the surface of nanocolorants occure rough when the concentration of DVB is in the range of2.0-50.0wt%. Compared with DVB, ternary crosslinking agent could produce nanocolorants with more regular morphology and clearer core-shell structure and narrower PDI. To obtain nanocolorants with clear core-shell structure, the amount of dye to total monomer should be controlled in the range of8.0-12.0wt%. The oil-soluble initiator is preferred because of the inhabitation of dye on the initiator. The stability of the miniemulsion increases with the increase of the amount of HD, and reach to the best as the molar ratio of AOS and HD is1:4. Adding the co-stablizer into the aqueous phase could avoid it being coated into the droplets, and thus better stabilize the latexIn the second part, a preliminary study of the bulk polymerization of HIPS and ABS resin was conducted. The results showed that pre-polymerization temperature of HIPS was determined at90～115℃, higher stirring speed contributes to phase transition of HIPS, and the amount of initiator should be controlled in the range of0.060-0.086wt%relative to total monomers. Relative lower temperature and longer grafting time could increase the grafting degree of PB. and thus increase the effective volume of rubber in ABS and ultimately reduce the Tg of ABS. Increasing the amount of PB rubber could also achieve the same effect.