Study On Modification Mechanisms Of Inorganic Nano-Particles/Polymer Composites

This thesis quantitatively investigated the brittle-ductile transitions in the PP/POE binary blends and PP/POE/Nano-CaCO₃ ternary blends, and the infulences of adding of nano-CaCO₃ to the whole composite's condensed structures, dynamic mechanical and rheological properties.The main results are as follows:1. Obvious brittle-ductile transitons were found in both PP/POE binary blends and PP/POE/Nano-CaCO₃ ternary blends with the increase of POE content. The matrix property had a vital influence on the occurence of brittle-ductile transitions.2. The brittle-ductile transitions in PP/POE binary blends and PP/POE/Nano-CaCO₃ ternary blends followed the critical matrix ligament thickness criterion and percolation theory. According to different equations, the Tc(Critical ligament thickness) values were calculated.3. Nano-CaCO₃ and POE had a synergistic toughening effect on toughening PP. In order to achieve that effect, the nano-CaCO₃ had...