Impact fracture mechanisms in polymer blends: Rubber‐toughened nylon
Impact fracture mechanisms in polymer blends: Rubber‐toughened nylon
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DOI：
10.1002/pol.1983.180210503
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发表时间：
1983-05
期刊：
影响因子：
--
通讯作者：
Souheng Wu
中科院分区：
文献类型：
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作者：
Souheng Wu
通过测量缺口断裂过程中几种不同过程中的能量耗散，分析了橡胶增韧尼龙的冲击断裂机理。这样就建立了冲击断裂的能量平衡。应力白化区为耗能区，其耗能密度为5.30卡/克，约有25%(即1.44卡/克)的冲击能被基质银纹耗散。大约75%(即3.86卡/克)的热量通过基质屈服而散失，导致能量耗散区的温升达到9.1°C。断口的表面储能可以忽略不计(即1.45×10−5cal/g)。在基质屈服过程中，约12%的α-Triclinic尼龙晶体转变为伪六方晶体。
The impact fracture mechanisms of rubber-toughened nylon are analyzed by measuring the energy dissipated in several different processes during notched fracture. An energy balance is thus established for the impact fracture. The stress-whitened zone is shown to be the energy dissipation zone, having an energy dissipation density of 5.30 cal/g. About 25% (i.e., 1.44 cal/g) of the impact energy is dissipated by matrix crazing. About 75% (i.e., 3.86 cal/g) is dissipated as heat by matrix yielding, causing a temperature rise of 9.1 °C in the energy dissipation zone. Surface energy storage on the fracture surfaces is negligible (i.e., 1.45 × 10−5 cal/g). During matrix yielding, about 12% of α-triclinic nylon crystals is transformed into pseudohexagonal crystals.