Study On Dispersion Of Nano-Calciumcarbinate In Polystyrene

The law of nano-CaCO₃ dispersed in PS was studied contraposing the problem of inorganic particles difficult to disperse in polymer by melt blended methods to prepare polymer/nano-inorganic particles composite. The surface chemical structure of CaCO₃ was studied by infrared spectrum analysis and evolved gas analysis, and the surface absorbing free energy(-AG) was testified by inverse gas chromatography, and the cohesive strength and the internal friction coefficient were studied by direct shear experiment. The results indicated that there was chemical bond between coupling agent and nano-CaCO₃; the dispersion degree of nano-CaCO₃ was the best and absorbing free energy(-AG) to non-polar probe was most, and the cohesive strength of nano-CaCO₃ was the lowest when the dosage of couple treating nano-CaCO₃ was 1.5%wt.PS/nano-CaCO₃ composite was prepared two-roll open mill. And the transmission electron microscope(TEM) photos were taken to observe dispersion morphology of nano-CaCO₃ in PS. The TEM photos of nano-CaCO₃ filled in PS were treated by image analysis software. The...