IntroductionEpoxy Resin Adhesives: Properties and ApplicationsTable 1: Key Properties of Epoxy
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Epoxy Resin Adhesives: Properties and Applications
| Property | Typical Value | Significance |
|---|---|---|
| Viscosity | 500-50.000 cP | Determines application method |
| Pot Life | 5 min – 24 hrs | Working time before curing |
| Cure Time | 30 min – 7 days | Full strength development |
| Tensile Strength | 20-50 MPa | Structural bonding capability |
| Service Temperature | -40°C to 150°C | Thermal stability range |
| Type | Cure Mechanism | Avantages | Limitations |
|---|---|---|---|
| One-Part | Heat-activated | No mixing, consistent quality | Requires oven cure |
| Two-Part | Room/heat cure | Versatile, fast curing | Mixing required |
| Structural Film | Heat/pressure | High strength, uniform thickness | Special equipment needed |
| Flexible | Room temp cure | Impact resistant | Lower strength |
| Conductive | Room/heat cure | EMI shielding | Higher cost |
| Industry | Application | Key Requirement |
|---|---|---|
| Automotive | Body panel bonding | Crash resistance |
| Aerospace | Composite joining | Lightweight strength |
| Electronics | Component attachment | Thermal/electrical conductivity |
| Construction | Concrete repair | Weather resistance |
| Marine | Hull repairs | Water resistance |
| Substrate | Preparation | Bond Strength Improvement |
|---|---|---|
| Metals | Solvent clean + abrasion | 300-400% |
| Plastics | Plasma treatment | 200-300% |
| Composites | Peel ply removal | 150-200% |
| Concrete | Acid etching | 250-350% |
| Glass | Silane primer | 400-500% |
| Test | Standard | Typical Value |
|---|---|---|
| Lap Shear | ASTM D1002 | 15-30 MPa |
| Peel Strength | ASTM D1876 | 5-15 N/mm |
| Impact Resistance | ASTM D950 | 15-30 J/m |
| Thermal Cycling | MIL-STD-883 | 500 cycles |
| Salt Spray | ASTM B117 | 1000+ hours |
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