Graphite modified epoxy-based adhesive for joining of aluminium and PP/graphite composites

被引：1
作者：
Rzeczkowski, P. [1 ]
Poetschke, P. [1 ]
Fischer, M. [2 ]
Kuehnert, I. [2 ]
Krause, B. [1 ]
机构：
[1] Leibniz Inst Polymerforsch Dresden eV, Dept Funct Nanocomposites & Blends, Hohe Str 6, D-01069 Dresden, Germany
[2] Leibniz Inst Polymerforsch Dresden eV, Dept Proc, Dresden, Germany
来源：
JOURNAL OF ADHESION | 2020年 / 96卷 / 1-4期
关键词：
Mechanical properties of adhesives; conductive adhesives; epoxy; epoxides; aluminium and alloys; composites; THERMAL-CONDUCTIVITY ENHANCEMENT; MODE-I FRACTURE; MECHANICAL-PROPERTIES; EXPANDED GRAPHITE; CARBON; JOINTS; PARTICLES; FILLER; NANO;
D O I：
10.1080/00218464.2019.1688152
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A graphite-modified adhesive was developed in order to simultaneously enhance the thermal conductivity and the strength of an adhesive joint. The thermal conductivity through the joint was investigated by using highly filled PP/graphite composite substrates, which were joined with an epoxy adhesive of different layer thicknesses. Similar measurements were carried out with a constant adhesive layer thickness, whilst applying an epoxy adhesive modified with expanded graphite (EG) (6, 10, and 20 wt%). By reducing the adhesive layer thickness or modifying the adhesive with conductive fillers, a significant increase of the thermal conductivity through the joint was achieved. The examination of the mechanical properties of the modified adhesives was carried out by tensile tests (adhesive only), lap-shear tests, and fracture energy tests (mode 1) with aluminium substrates. Modification of the adhesive with EG led to an increase of the tensile lap-shear strength and the adhesive fracture energy (mode 1) of the joint. In addition, burst pressure tests were performed to determine the strength of the joint in a complex component. The strength of the joint increased with the graphite content in the PP substrate and in the epoxy adhesive.
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收藏
页码：229 / 252
页数：24
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