Percolation threshold of Brittle-Ductile (B-D) transition and its relation with the affecting varibles (such as particle-size dispersity, interphase adhesion)in polymer blends are studied.Percolation Threshold (Φ...Percolation threshold of Brittle-Ductile (B-D) transition and its relation with the affecting varibles (such as particle-size dispersity, interphase adhesion)in polymer blends are studied.Percolation Threshold (Φ<sub>sc</sub>) which is equivalent to that of B-D transition and critical matrix ligament thickness (T<sub>c</sub>) are first independently calculated and the correlated equation between Φ<sub>sc</sub> and σ<sub>g</sub> is also given.In addition, a new type of master curve of S<sub>1</sub>(G<sub>0</sub>,toughness) with Φ<sub>s</sub> (stress volume fraction) for polymer blends is proposed and the new parameter Φ<sub>so</sub> (up-limited stress volume fraction) is also discussed. The results confirm that Φ<sub>sc</sub> is not only related with σ<sub>g</sub>,but also tightly related with the interphase adhesion.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘Percolation threshold of Brittle-Ductile (B-D) transition and its relation with the affecting varibles (such as particle-size dispersity, interphase adhesion)in polymer blends are studied.Percolation Threshold (Φ<sub>sc</sub>) which is equivalent to that of B-D transition and critical matrix ligament thickness (T<sub>c</sub>) are first independently calculated and the correlated equation between Φ<sub>sc</sub> and σ<sub>g</sub> is also given.In addition, a new type of master curve of S<sub>1</sub>(G<sub>0</sub>,toughness) with Φ<sub>s</sub> (stress volume fraction) for polymer blends is proposed and the new parameter Φ<sub>so</sub> (up-limited stress volume fraction) is also discussed. The results confirm that Φ<sub>sc</sub> is not only related with σ<sub>g</sub>,but also tightly related with the interphase adhesion.