Thermoplastic Polymers (Thermoplastics) (Leaving Cert Engineering): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What is the key characteristic of thermoplastic polymers?
What is the key characteristic of thermoplastic polymers?
Flexible when heated, rigid when cooled
Which material is an example of a thermoplastic polymer?
Which material is an example of a thermoplastic polymer?
Polythene (plastic bags)
What process is used to produce thermoplastic polymers?
What process is used to produce thermoplastic polymers?
Addition polymerisation
What is the role of a free radical in making thermoplastics?
What is the role of a free radical in making thermoplastics?
Breaks double bonds between carbon atoms
What type of structure do thermoplastics have?
What type of structure do thermoplastics have?
Amorphous structure
What type of primary bonding exists within thermoplastic chains?
What type of primary bonding exists within thermoplastic chains?
Covalent bonding
What are Van Der Wall's Forces?
What are Van Der Wall's Forces?
Weak secondary bonds between chains
Why do thermoplastics become flexible when heated?
Why do thermoplastics become flexible when heated?
Van Der Wall's Forces break with heat
What is the purpose of creating co-polymers?
What is the purpose of creating co-polymers?
Improve properties like hardness/flexibility
What effect does branching have on thermoplastics?
What effect does branching have on thermoplastics?
Creates firmer, more rigid material
What do crystalline regions provide to thermoplastics?
What do crystalline regions provide to thermoplastics?
More tensile strength in aligned direction
How do thermosetting polymers differ from thermoplastics?
How do thermosetting polymers differ from thermoplastics?
Cannot be reheated or remoulded