PHYSICAL AND MECHANICAL PROPERTIES OF HIGH MOLECULAR WEIGHT POLYSTYRENE NANOPARTICLES

摘要

The high molecular weight (MW) polystyrene (PS) particles were synthesized by benzoyl peroxide, sodium lauryl sulfate and styrene. The particle size varies from micro to nanometer. The microscopy analysis (TEM/AFM) shows the spherical shape of PS particles. The effects of particle size, which varies from micro to nanometer scale glass transition temperature (Tg), and mechanical properties were studied. DSC show that the nanoparticles of PS have higher T_g compared to the microsized PS. The elastic modulus of individual nanospherical PS particles is computed from 'force-distance' mapping curves of AFM.