Effect of Polymerized Rosin on Polymer Microstructure and Adhesive Properties in Tackified Acrylate Emulsions

摘要

The polyacrylate emulsions tackified by polymerized rosin were prepared via seeded semicontinous emulsion polymerization. The effects of polymerized rosin on the monomer conversion, particle size, polymer microstructure (gel fraction, cross-linking density and sol molecular weight) and adhesive properties were studied. The instantaneous conversion, gel fraction, cross-linking density and sol molecular weight decreased significantly due to the chain transfer and inhibition of the abietic acid. Also, the related mechanism was discussed. Dynamic light scattering was used to monitor the particle size of tackified emulsion. The relationship between the main adhesive properties of tackified latex films and polymer microstrcuture was studied.