7. Foams

1
7. Foams
Thermal conductivity
2
(No Transcript)
3
Foam formation
Polyurethanes

• Reactions

4

• Isocyanates

5
(No Transcript)
6

• Polyols

7
(No Transcript)
8
(No Transcript)
9

• Catalysts
• Surfactants
• Flame retardants

10

• Blowing agents

11
One-components polyurethanes
Polyisocyanurates
12
- Isocyanurate form are usually formed with
polymeric isocyanated.
13
Polyimide foam
Urea formaldehyde Polystyrene Phenolics
14

• Secondary reactive blowing agents
• Vinyl
• Thermoplastic foams
• Reinforced foams
• Epoxy
• Silicone
• Syntactic foams