cracking and joining Flashcards
1
Q
cracking of fractions definition
A
breaking long chain molecules into shorter and more useful products. Involves heat and a catalyst
2
Q
products of cracking
A
Starts as an alkane. One of the products is an alkane but the other is an alkene.
3
Q
monomer
A
small molecules which join to form polymers
4
Q
polymerisation
A
joining a large number of small molecules to make a very long chain.
5
Q
why are plastics useful
A
plastics are very useful because they are strong but flexible and can be moulded onto lots of shapes
6
Q
chemical and physical plastic properties (5)
A
low reactivity, insoluble in water, good thermal insulator, can float on water, resistant to cracking.
