Preparation and Mechanical Characterization of Tack-free Surfaced CSR/Epoxy Adhesive Films

Abstract

High performance epoxy systems have been widely used in electronic devices, aerospace structures, and automotive parts. In this study, introduction of both core-shell rubber (CSR) and thermoplastics into epoxy systems was considered to improve mechanical properties as well as to make tack-free surfaced epoxy films. CSR particles were very uniformly dispersed into epoxy by means of ultrasonic dismembrator and homogenizer at the presence of polymeric dispersion agent. Well-dispersed CSR containing epoxy systems exhibited higher peel strengths at room temperature. Furthermore, peel strength as well as impact peel strength at low temperature could be comprehensively improved.

Experimental investigation on the effect of nanostructuration on the adherence properties of epoxy adhesives by a probe tack test

“…Several authors reported by transmission electron microscopy (TEM) [13,17,18], scanning electron microscope (SEM) [12,18] or atomic force microscopy (AFM) [19], that this kind of fillers lead to a regular distribution of nanodomains. It was also shown that the nanoparticles filled epoxy had their toughness improved [20], as well as their impact resistance [21].…”

“…Toughened epoxyamine adhesives exhibit an even higher debonding energy [21], mainly due to an increase of viscoelastic dissipation. Many adhesive tests, classified in three categories following the solicitation mode (I, II or III) are used to quantify the total debonding energy [27].…”

Mechanical Characterization of Core-Shell Rubber/Epoxy Polymers for Automotive Structural Adhesives as a Function of Operating Temperature

“…However, conventional studies on CSR nanoparticle/epoxy composite polymers have mainly considered the mechanical properties at room temperature. A number of studies have characterized the properties of the CSR/epoxy at cryogenic temperatures (at 77 K under LN 2 ambient conditions) [ 38 , 39 ] and low temperatures (from −109 to 20 °C) [ 40 , 41 , 42 ], but these studies are rare. Nevertheless, this temperature range is only a partial intersection of the operating temperature range required for the automotive industry, which presents insufficient information for structural adhesive manufacturing.…”