Synthesis and Kinetics of Polybutyl Methacrylate Nanoparticles
Three kinds of butyl methacrylate(PBMA)nanoparticles with different functional networks were prepared by microemulsion polymerization.Differential scanning calorimeter(DSC),Dynamic light scattering meter(DLS),and rotational rheometer(MARS60,Thermo-Scientific)were used to test the samples.The particle size,glass transition temperature and linear viscoelasticity were characterized.The linear viscoelastic principal curve of the nanoparticle melt was analyzed,and it was found that the relaxation time of the end increased with the increase of the functional degree of the crosslinker.In addition,we mixed nanoparticles with PBMA linear chains of different molecular weights to prepare nanocomposites and carried out rheological tests.It was found that the nanoparticles would swelling in the small-molecular weight PBMA matrix,and their swelling ability depended on the topology of the network,showing different dynamic behaviors.In the macromolecular matrix,the relaxation behavior of the nanoparticles was not affected.
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