Abstract:
In this research, the polymer particles synthesized via free radical polymerization in an emulsifier-free emulsion polymerization was studied.
The monomer as an itaconic acid obtained from renewable resources by fermentation process of biomass was implemented to copolymerize with styrene compared with the petrochemical monomer as a methacrylic acid. The polymerization was carried out at 70 degree Celsius under vacuum using potassium persulfate as an initiator. Using both acids, copolymer particles represented spherical particle with narrow particle size distribution. However, the use of itaconic acid performed faster rate of polymerization and smaller amount of coagulant than the use of methacrylic acid. In addition, the monomer concentration is able up to 30 % with only 13 % of coagulant.
Therefore, in this research copolymer particle was successfully prepared by emulsifier-free emulsion polymerization using itaconic acid supplanting petrochemical monomer as comonomer. The obtained particle represented high colloidal stability. Because of high monomer concentration up to 30 %, it could be applied in the industry.