Preparation and properties of kaolin grafted alkyl amine type dripping agent/polyethylene composites

The eighteen alkyl diethanolamine acrylic monoester dripping agent (AAM) was grafted onto kaolin (Ka) by surface grafting, the grafting of AAM and Ka (Ka-g-AAM) was prepared. Then Ka-g-AAM/linear low density polyethylene (LLDPE) composites were prepared by melt extrusion. The structure and properties of Ka-g-AAM/LLDPE were investigated by FTIR, SEM, DSC and acceleration dripping testing etc. The results indicate that AAM is grafted onto the surface of Ka. Compared with AAM/LLDPE and Ka-AAM/LLDPE composite, Ka-g-AAM/LLDPE composites have inconspicuous changes on the melting temperature, the crystallization temperature and mechanical properties. The acceleration dripping duration of Ka-g-AAM/LLDPE composite films is 23 days at 60℃, which is 4 days longer than that of AAM/LLDPE composite.