Burning solids Flashcards
1
Q
pyrolysis of wood
A
thermal decomposition to produce lower molecular mass compounds with out oxygen
because wood = cellulose it burns easily
2
Q
thermoplastics
A
- linear chains, reversible melting
- melts before it ignites and can be spread by burning droplets/ pools
3
Q
thermoset
A
-cross link structure, does not melt
- decomposes and leaves char, burns like wood
4
Q
thermoset decomp - end chain scission
A
removes monomer from end of backbone
5
Q
thermoset decomp - random scission
A
main chain broken at random points until small sections are made
6
Q
thermoset decomp - chain stripping
A
back bone intact but molecules not part of the main chain break away
7
Q
thermoset decomp - crosslinking
A
more crosslinking added - generates char
8
Q
burning metals
A
Al- can burn but is rare
Mg- burns with a bright white flame; not extinguished by water
