Effects ofin situ esterification on the performance of carboxyl functionalized rubber-modified epoxy film adhesives

Abstract

Epoxy-based film adhesive formulations were developed with 10 wt % solid carboxyl functional rubber. Due to the high rubber content and resulting viscosity restrictions, the rubber could not be prereacted with the epoxy before hot-melt filming. Therefore, an esterification catalyst was used to perform this reaction in situ before the epoxy curing reactions. The performance of this adhesive system is compared to that of one without the esterification catalyst. A significant difference in the flow characteristics was observed with incorporation of the esterification catalyst, but only small variations in mechanical performance were found.

Bonding Mechanisms at Buried Interfaces between Carboxylic Polymers and Treated Zinc Surfaces

“…17,18 Adhesives are functional polymers, which are often used in automotive and construction industries for many applications, ranging from the bonding of metals or composites to materials for aerodynamic surfaces. 19 As adhesives, carboxylic resins such as polyesters are often used in industrial polymer coatings because of their desirable structural and interfacial performances. 20,21 In addition to the industrial applications, carboxylic groups have attracted much attention because of their importance to understand the fundamental adhesion mechanisms between metal surfaces and polymers.…”

“…In addition to metal surface beneficial treatments, polymer coatings can be functionalized to enhance the adhesion of the polymer to the metal surface. , Adhesives are functional polymers, which are often used in automotive and construction industries for many applications, ranging from the bonding of metals or composites to materials for aerodynamic surfaces . As adhesives, carboxylic resins such as polyesters are often used in industrial polymer coatings because of their desirable structural and interfacial performances. , In addition to the industrial applications, carboxylic groups have attracted much attention because of their importance to understand the fundamental adhesion mechanisms between metal surfaces and polymers. − Therefore, examination of their interfacial functional properties assists in developing beneficial polymer and metal surface modification procedures for several applications.…”

Influence of elastomer distribution on the cryogenic microcracking of carbon fiber/epoxy composites

“…Nevertheless, due to their high molecular weight and inherent elasticity, the percentage of a dissolved solid rubber in a formulation is usually small. Hayes and coworkers showed that higher quantities of solid carboxyl‐functionalized rubber could be incorporated in a hot‐melt epoxy‐based resin if the epoxy/carboxyl esterification is delayed until after the prepreg is developed 37…”