Strength of Polymer Interfaces
Strength of Polymer Interfaces
复制标题
聚合物界面的强度
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
R. Wool
中科院分区：
文献类型：
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作者：
R. Wool
摘要：检查了聚合物-聚合物界面强度发展的研究，并考虑了在相似和不同聚合物焊接中的应用。焊缝的断裂特性，即断裂应力、断裂能、GIc、疲劳裂纹扩展速率 da/dN 以及变形过程的微观方面，通过紧凑拉伸、楔形解理和双悬臂梁愈合实验来确定。机械性能通过涉及解缠结和键断裂的微观变形机制与界面结构相关。焊接界面的时间相关结构由聚合物链的分子动力学、化学相容性和扩散界面的分形性质决定。 Several experimental methods are used to probe the weld structure and compare with theoretical scaling laws.给出了对称非晶焊缝、不相容和相容非对称非晶焊缝、不相容半晶焊缝和聚合物金属焊缝的结果。 The relevance of interface healing studies to thermal, friction, solvent and ultrasonic welds is discussed.
Abstract : Studies of strength development at polymer-polymer interfaces are examined and applications to welding of similar and dissimilar polymers are considered. The fracture properties of the weld, namely, fracture stress, fracture energy, GIc, fatigue crack propagation rate da/dN, and microscopic aspects of the deformation process are determined using compact tension, wedge cleavage, and double cantilever beam healing experiments. The mechanical properties are related to the structure of the interface via microscopic deformation mechanisms involving disentanglement and bond rupture. The time dependent structure of the welding interface is determined in terms of the molecular dynamics of the polymer chains, the chemical compatibility, and the fractal nature of diffuse interfaces. Several experimental methods are used to probe the weld structure and compare with theoretical scaling laws. Results are given for symmetric amorphous welds, incompatible and compatible asymmetric amorphous welds, incompatible semicrystalline and polymer-metal welds. The relevance of interface healing studies to thermal, friction, solvent and ultrasonic welds is discussed.