PPO/SEBS-g-MAH共混体系的“瞬间原位大取向”增韧模型

“INSTANTANEOUS IN SITU HIGH ORIENTATION” TOUGHENED MODEL OF PPO/SEBS-G-MAH BLENDS

针对具有网状结构的 ＰＰＯ／ＳＥＢＳ－ｇ－ＭＡＨ共混合金冲击断面的形貌和微观形变过程，提出了“瞬间原位大取向”增韧模型该模型认为，超韧 ＰＰＯ／ＳＥＢＳ－ｇ－ＭＡＨ的冲击断裂首先是弹性体周围产生微穴，微穴诱发基体产生剪切带，基体在剪切屈服过程中被网状的弹性体携带共同发生大的取向行为，形成取向分子束，从而吸收大量能量，达到超韧水平．

For PPO/SEBS-g-MAH (Kraton FG 1901) blends with network morphology, “In- stantaneous in siam high orientation”, toughened model was proposed based on the fracture surfaces and microstructural deformation process. According to this model, the impact fracture of PPO/SEBS- g-MAH blends was initiated from the micro-cavities inside the elastomer and matrix, shear bands were subsequently induced by the micro-cavities resulting in a high orientation of the network structure, during which orientation molecular bunches were formed and a great amount of energy was consumed.