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Mechanism of Adhesive in Secondary Bonding of Fiberglass Composites with Peel Ply Surface Preparation Pages: 14 Published: Jan 2004
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View License Agreement Source: STP1455-EB Abstract The surface composition and morphology of fiberglass/epoxy composites prepared by the use of bondable peel ply and sanding will be presented. Bondable peel ply is a material which provides a surface ready for secondary bonding following peel ply removal without requiring further treatment. The available results indicate mechanisms which may degrade bonds using bondable peel ply. Those same results also give insight into how bondable peel ply achieves a bondable surface when conditions are optimal. Optimal conditions can produce a surface whose 90° peel strength is 1215 lbs/in-width versus suboptimal conditions which produce strengths of 14 lbs/in-width. The case studied in this effort is 350°F curing fiberglass/epoxy bonded secondarily with 250°F curing toughened epoxy adhesive.
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