Thermosetting Polymers (Thermosets) (Leaving Cert Engineering): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the key distinguishing feature of thermosetting polymers once they are formed and set?
What is the key distinguishing feature of thermosetting polymers once they are formed and set?
They cannot be reheated and remoulded
Which of the following are common examples of thermosetting polymers?
Which of the following are common examples of thermosetting polymers?
Bakelite and epoxy resins
What manufacturing process is used to produce thermosets?
What manufacturing process is used to produce thermosets?
Condensation polymerisation
What small molecule is usually eliminated as a byproduct during condensation polymerisation?
What small molecule is usually eliminated as a byproduct during condensation polymerisation?
Water
How do the starting materials for thermosets differ from those used for thermoplastics?
How do the starting materials for thermosets differ from those used for thermoplastics?
They use two distinctly different molecules
Which two molecules react together to form Bakelite?
Which two molecules react together to form Bakelite?
Phenol and formaldehyde
What type of structure do thermosets have that makes them irreversible?
What type of structure do thermosets have that makes them irreversible?
Cross-linked network
What type of bonding exists throughout the entire structure of thermosets?
What type of bonding exists throughout the entire structure of thermosets?
Primary bonding
What physical properties do thermosets typically have compared to thermoplastics?
What physical properties do thermosets typically have compared to thermoplastics?
Quite rigid and brittle
How does the structure of thermosets differ from thermoplastics?
How does the structure of thermosets differ from thermoplastics?
Thermosets have cross-linked networks
What characteristic describes the curing process of thermosets?
What characteristic describes the curing process of thermosets?
One-way chemical transformation
Why was Bakelite widely used for electrical switches and housings?
Why was Bakelite widely used for electrical switches and housings?
It provided insulation & heat resistance