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http://dx.doi.org/10.5781/JWJ.2015.33.4.44

The Effect of Nano Functionalized Block Copolymer Addition on the Joint Strength of Structural Epoxy Adhesive for Car Body Assembly  

Lee, Hye-rim (Welding & Joining R&D Group/Micro-Joining Center, KITECH)
Lee, So-jeong (Welding & Joining R&D Group/Micro-Joining Center, KITECH)
Lim, Chang-young (Technical Research Laboratories, Shinyoung Co., Ltd.)
Seo, Jong-dock (Technical Research Laboratories, Shinyoung Co., Ltd.)
Kim, Mok-soon (School of Materials Science & Engineering, Inha University)
Kim, Jun-ki (Welding & Joining R&D Group/Micro-Joining Center, KITECH)
Publication Information
Journal of Welding and Joining / v.33, no.4, 2015 , pp. 44-49 More about this Journal
Abstract
The structural epoxy adhesive used in car body assembly needs the highest level of joint mechanical strength under lap shear, T-peel and impact peel conditions. In this study, the effect of nano functionalized block copolymer addition on the impact peel strength of epoxy adhesive was investigated. DSC analysis showed that the addition of nano functionalized block copolymer did not affect the curing reaction of epoxy adhesive. From single lap shear test, it was found out that the addition of nano functionalized block copolymer slightly decreased the cohesive strength of cured adhesive layer. The addition of nano functionalized block copolymer showed beneficial effect on T-peel strength by changing the adhesive failure mode to the mixed mode. However, the addition of nano functionalized block copolymer just decreased the room temperature impact peel strength. It was considered that the addition of nano functionalized block copolymer could have effect on disturbing the crack propagation only for the case of slow strain rate.
Keywords
Structural epoxy adhesive; Nano functionalized block copolymer; Car body assembly; Single lap shear strength; T-peel strength; Impact peel strength;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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