Single-lap joint creep behaviour of two soft adhesives

IF 2.9 4区 材料科学 Q2 ENGINEERING, CHEMICAL
E. Ernault, J. Diani, Q. Schmid
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引用次数: 2

Abstract

ABSTRACT Two hot melt pressure sensitive adhesives have been submitted to bonded joint creep tests. An amorphous and a semicrystalline adhesives have been considered for their different microstructures leading to different mechanical behaviors. The adhesives are referred as soft since their glass transition temperatures stand well below the temperatures of applications, resulting in low stiffnesses. The creep of structural joints has been characterized with single-lap joint tests. Two types of adherends were considered either glass or stainless steel. The adherend roughness and the adhesive wettability have been characterized before testing. The significant stiffness contrast between the stiff adherends and the soft adhesives promoted homogeneous simple shear creeps. The amorphous adhesive showed creep behaviors that depend on the type of substrates, showing that the joint viscoelasticity could not be predicted knowing the bulk adhesive viscoelasticity only, unlike for stiff adhesives as recently reported in the literature. Finally, the single-lap joint creep behaviors of both adhesives on the same glass adherends were compared and discussed at the light of their different microstructures inducing different mechanical behaviors.
两种软胶粘剂的单搭接蠕变行为
摘要:两种热熔压敏胶粘剂已被提交进行粘接接头蠕变试验。非晶态和半晶态粘合剂由于其不同的微观结构导致不同的机械行为而被考虑。粘合剂被称为软的,因为它们的玻璃化转变温度远低于应用温度,导致低刚度。结构接头的蠕变已通过单搭接接头试验进行了表征。有两种类型的粘附物被认为是玻璃或不锈钢。在测试之前已经表征了粘附物的粗糙度和粘合剂的润湿性。硬粘附物和软粘合剂之间的显著刚度对比促进了均匀的简单剪切蠕变。无定形粘合剂表现出取决于基底类型的蠕变行为,表明与文献中最近报道的刚性粘合剂不同,仅知道本体粘合剂的粘弹性就无法预测接缝粘弹性。最后,从微观结构不同导致不同力学行为的角度,比较和讨论了两种粘合剂在同一玻璃被粘物上的单搭接蠕变行为。
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来源期刊
Journal of Adhesion
Journal of Adhesion 工程技术-材料科学:综合
CiteScore
5.30
自引率
9.10%
发文量
55
审稿时长
1 months
期刊介绍: The Journal of Adhesion is dedicated to perpetuating understanding of the phenomenon of adhesion and its practical applications. The art of adhesion is maturing into a science that requires a broad, coordinated interdisciplinary effort to help illuminate its complex nature and numerous manifestations.
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