Topic 6: Thermoset

What is Thermoset?

• Polymer that forms a cross-linked molecular lattice

• It cannot be melted for reuse

• Poor resistant to heat and chemical reactions

• All of them

Which of the following is not a thermoset?

• Epoxy resins

• Urea-formaldehyde resins

• Polybutadiene

• Polyurethane

What are the properties of Urea-formaldehyde resins?

• Poor water absorption

• Poor electrical insulator only at low frequencies.

• Poor resistance to organic substances

• None of them

Melamine-formaldehyde resins are prepared from which monomers?

• Melamine

• Urea

• Formaldehyde

• Glycerol

Who was the first to synthesize Alkyd resins?

• The Hulk

• Peter Parker

• Dr. Strange

• J. Smith.

Epoxy resins are prepared from which monomers?

• Bisphenol A

• Epichlorohydrin

• Melamine

• Urea

What are the applications of Epoxy resins?

• Encapsulate electrical

• Surface coatings

• Adhesives and adhesives

• All of them

What are the applications of Polyurethane?

• Bottles

• Seat cushions

• Plastic bag

• All of them