Fracture mechanisms of polymer interfaces reinforced with block copolymers: transition from chain pullout to crazing
Fracture mechanisms of polymer interfaces reinforced with block copolymers: transition from chain pullout to crazing
复制标题
嵌段共聚物增强聚合物界面的断裂机制：从链拔出到开裂的转变
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
C. Hui
中科院分区：
文献类型：
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作者：
J. Washiyama;E. Kramer;C. Hui
We have investigated the fracture toughness and fracture mechanisms of planar interfaces between polystyrene (PS) and poly(2-vinylpyridine) (PVP), which were reinforced with a deuterium-labeled dPS/PVP block copolymer, which has a long dPS block (polymerization index N dPS =580) and an intermediate length PVP one (N PVP =220). The critical energy release rate of an interfacial crack, G c (or fracture toughness) was measured as a function of the areal chain density of the block copolymer, Σ. At a critical areal chain density, Σ * = 0.04 chains/nm 2 , a transitionin the fracture mechanisms from chain pullout of the PBP block (Σ Σ * ) followed by fracture of the craze was observed
