摘要
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_(sc)) which is equivalent to that of B-D transition and critical matrix ligament thickness (T_c) are first independently calculated and the correlated equation between Φ_(sc) and σ_g is also given.In addition, a new type of master curve of S_1(G_0,toughness) with Φ_s (stress volume fraction) for polymer blends is proposed and the new parameter Φ_(so) (up-limited stress volume fraction) is also discussed. The results confirm that Φ_(sc) is not only related with σ_g,but also tightly related with the interphase adhesion.
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.
基金
Project supported by the National Natural Science Foundation of China.
