C1:9 Designer polymers Flashcards
1
Q
What is the difference between a polymer with cross links and one without?
A
the one with will be stiffer and have a higher melting point.
2
Q
What are cross links?
A
Cross links are covalent bonds between polymer molecules which make the polymer rigid and have a higher melting point.
3
Q
What properties do breathable materials have?
A
They stop rain coming in but let sweat out.
4
Q
The polymer molecules in many plastics are attracted to each other only by which force?
A
weak intermolecular forces.
5
Q
What is the PTFE layer in Gortex laminated in?
A
nylon
