Preparation Of Nano-calcium Carbonate Masterbatch And Research Of Its Modification On Plastics

Mach attention has been put on nano-calcium carbonate which is a low-price and sufficient filler owning to its excellent properties. Because of its great specific surface area and high-surface energy , Nano-calcium carbonate is under a thermodynamics instability state and has a apparently inclination to agglomerate. So it cannot be directly used without previous surface modification.In this paper, the surface of nano-calcium carbonate was modified by titanate coupling agents and polymethylmethacrylate and melt extrusion-grafting was used to prepared compatibilizer HDPE-g-MAH. The effect of nano-calcium carbonate reinforce and toughen HDPE was studied. On this base, nano-calcium carbonate was prepared to masterbatch and finally mixed with HDPE, LDPE and PP to prepare nano-composites.DSC and SEM were employed to investigate the intercalate, and the mechanical properties were also test, the results showed nano-calcium carbonate masterbatch with surface modification can obviously enhance the composite properties of plastic.