Compare epoxy and acrylic adhesives for industrial applications.
Understanding Adhesive Chemistry Fundamentals
Epoxy adhesives cure through addition reaction between epoxy groups and curing agents. Acrylic adhesives polymerize through free radical mechanisms.
Bond Strength Comparison
Epoxy adhesives typically achieve higher ultimate bond strengths (5,000-6,000 psi). Acrylic adhesives achieve 3,000-4,500 psi but offer superior impact resistance.
Cure Speed and Processing
Acrylics fixture in 2-5 minutes. Epoxies typically require 5-60 minutes for fixture with full cure developing over 24-72 hours.
| Property | Epoxy | Acrylic |
|---|---|---|
| Lap Shear Strength | 3,000-6,000 psi | 3,000-4,500 psi |
| Fixture Time | 5-60 min | 2-5 min |
- Consider production rate requirements
- Evaluate substrate surface condition
Frequently Asked Questions
Which provides stronger bonds?
Epoxy adhesives typically achieve higher ultimate bond strengths.
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