Formulation of Toughened Paste Adhesives for Reduced-Pollutant Electron Beam Repair and Assembly of Composite Structures
Abstract
Historically, e-beam processed resins resulted in brittle matrix materials that were ineffective in meeting the performance demands of the military, largely because the resins lacked toughness. Toughness is a critical parameter of resins that determines the ability of the resin to absorb energy and resist crack growth under stress. The U.S. Army Research Laboratory (ARL) has developed the first high-performance adhesive paste cured by e-beam for bonding and repair of military PMC structures. This new material, ADEPO1, is a low-pollutant technology with the potential to replace mechanical fasteners and autoclave processed adhesives for repair and assembly in military applications. ADEPO1 was developed from interpenetrating polymer network (IPN) architecture as a two-part paste adhesive. The chemistry of ADEPO1 is presented as well as selected design parameters that influenced the development of this class of adhesive pastes. The method of processing and the development of in situ toughening during processing are presented. Further, the performance of ADEPO1 is compared to traditional aerospace-grade adhesives, demonstrating the feasibility of designing high-performance e-beam cured materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2000
- Accession Number
- ADA382718
Entities
People
- Bruce K. Fink
- James M. Sands
- Steven H. McKnight
Organizations
- United States Army Research Laboratory