What is a polymer?
a non metalic solid made up of long strings of molecules
a shape with five sides
What is a thermo-hardening polymer?
a polymer that can not be reshaped more than once
a shape with sharp corners
a hard polymer
what is a thermo-softening polymer
a polymer that can be reshaped when heated
a polymer that can be heated
a very soft polymer
How can a polymer be molded?
-plastic oven -strip heater -electric iron
- plastic oven -strip heater
what does 1 in recycling codes stand for ?
PET
PTY
what does 2 mean in recycling code
HSPE
HDPE
what does 3 mean in recycling code?
HIV
PVC
what does 4 stand for in the recycling code?
LDPE
LCD
what does 5 mean in recycling code
PP
TT
what does 6 stand for in recycling code?
ST
PS
