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密封胶的起始形态一般呈液状,但是,由于其配方、类型以及作为基体的高分子化合物本身性能的各不同,因此在使用时表现出来的性状也各不相同。所以必须结合它在接合表面之间的性状作具体的分析。例如,对于干性固着型的密封胶来说,由于它们呈固态,而且粘弹性较差,在受到外力紧固后的情况与固体垫圈有些相似,因此必须结合分析固体垫圈来探索其密封机理。干性剥离型除与干性固着型在最终状态相似外,还表现出优良的粘弹性和受压下的回复能力,因此在密封机理上也不尽相同。而半干性粘弹型和不干性粘着型的密封胶在接合面之间的最终状态是一种粘稠的物质,其机理介乎弹性力学与流体力学之间。近年来,人们分别用粘性流动理论和能量吸收理论来研究和探讨密封胶的密封机理。
The initial form of the sealant is generally liquid, however, due to its formulation, type and the polymer itself as a matrix of different properties, so when used in the performance of different characters. Therefore, it must be combined with its properties in the bonding surface between the specific analysis. For example, for dry fixing sealants, due to their solid state and poor viscoelasticity, they are somewhat similar to solid gaskets when subjected to external forces and therefore must be analyzed in conjunction with solid gaskets to explore their sealing mechanism. In addition to the dry release of dry-type in addition to the final state of similar, but also showed excellent viscoelasticity and ability to recover under pressure, so the sealing mechanism is not the same. The semi-viscoelastic and non-drying adhesive sealant in the joint between the final state is a viscous material, the mechanism between elastic mechanics and fluid mechanics. In recent years, people have used viscous flow theory and energy absorption theory to study and explore the sealant sealing mechanism.