Rheological Behavior and Mechanical Properties of PVC/MAP-POSS Nanocomposites

The polyhedral oligomeric silsesquioxanes which contains methylacryloylpropyl groups (MAP-POSS) was synthesized. The MAP-POSS/PVC nanocomposites were prepared. The influences of composition, shear rate' shear stress on melting rheological behavior of MAP-POSS/PVC nanocomposites were discussed. The dynamic mechanical properties, mechanical properties, and morphology were determined by DMA, material tester and SEM, respectively. The result shows that the plastic times decreases and melt viscosity increases with increasing MAP-POSS content. The n has a maximal value at 5 wt% MAP-POSS content, but have best impact strength at 3%. MAP-POSS can use as process aid and impact aid of PVC at appropriate contents. POLYM. COMPOS., 31:1822–1827, 2010. © 2010 Society of Plastics Engineers.