Preparation and characterization of pure polyacrylate polymer colloid through emulsion polymerization using a novel initiator

A series of acrylic polymer colloids were prepared via semi-continuous seeded emulsion polymerization of BA and MMA in water phase when OP-10 and AIBI is used to be emulsifier and initiator, respectively. FTIR spectrum identifies the formation of copolymers of P (MMA-co-BA). DSC confirms that the colloid is a kind of random copolymer and the consistency among the chain segment is fairly good. The emulsion polymerization conditions of preparing acrylic polymer colloid are optimized. Results show that the conversion rate is high and the coagulum is low and the particle size of the acrylic polymer colloids is small when the amount of AIBI is 0.75 g. The polymerization temperature is 70 °C, which is lower than the one that the emulsion polymerization is initiated with the persulfate.

The conversion rate of monomers is gradually increased with the increase of the amount of AIBI. However, the coagulum rate is decreased firstly, and then is increased with the increase of the amount of AIBI.Figure optionsDownload as PowerPoint slideHighlights
► AIBI is used to initiate the emulsion polymerization of BA and MMA firstly.
► Conversion is high and coagulum is low when the moderate amount of AIBI is added.
► Reaction temperature is lower than the one that is initiated with persulfate.