Structure and Performance of Polypropylene Modified with Attapulgite Grafted by Dendrimer-like PAMAM

The ATP-PAMAM nanoparticles were prepared by grafting of polyamidoamine(PAMAM) onto the attapulgite(ATP) particles treated with silane coupling agent,and PP/ATP-PAMAM composites were preprepared via melt blending using ATP-PAMAM as dispersion phase and PP-g-MAH as compatibilizer.The results show that the mechanical properties of PP/ATP-PAMAM composites are much higher than those of PP and PP/ATP nanocomposites,due to the better compatibility of ATP-PAMAM particles with PP matrix.SEM results indicate that the ATP-PAMAM particles are dispersed uniformly in the nanocomposites for the chemical action between the amino-group in ATP-PAMAM and the carboxy group in PP-g-MAH.Notable increasing in crystallization degree of PP in the PP/ATP-PAMAM composite is detrcted for the heterogeneous nucleation was induced by the ATP-PAMAM paeticles.