Interfacial debonding behavior of a rigid particle-filled polymer composite
Interfacial debonding behavior of a rigid particle-filled polymer composite
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DOI：
10.1163/156855403765826892
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发表时间：
2003-01-01
影响因子：
2.6
通讯作者：
Zhao, XF
中科院分区：
文献类型：
--
作者：
Bai, SL;Wang, M;Zhao, XF
将未改性和偶联剂改性的玻璃珠分别填充到高密度聚乙烯中，得到不同界面粘合强度的复合材料。原位拉伸试验揭示了主要由界面脱粘引起的损伤机制。观察并研究了界面脱粘过程。发现脱粘应力与颗粒两个极处形成的张开角度线性相关。除了相应的脱粘应力之外，还测量初始和最终张开角度。对于跨界面的机械锚固和物理缠结，利用格里菲斯断裂理论获得的界面断裂能分别为0.028 J m(-2) 和0.058 J m(-2)。界面附着力越强，最大张开角度越小，脱粘应力越大。
Glass beads, non-modified and modified with coupling agent, were filled separately into high density polyethylene to obtain composite materials with different interfacial adhesion strengths. In situ tensile tests reveal the damage mechanisms, which are mainly induced by the interfacial debonding. The interfacial debonding process is observed and studied. The debonding stress is found to be linearly related to the opening angle formed at two poles of the particles. Initial and final opening angles, in addition to the corresponding debonding stresses, are measured. The interfacial fracture energy obtained by using the Griffith fracture theory is found to be 0.028 J m(-2) and 0.058 J m(-2) for mechanical anchorage and physical entanglement across the interface, respectively. The stronger the interfacial adhesion, the smaller is the maximum opening angle and greater the debonding stress.