types of plastic Flashcards
1
Q
2 types of plastic
A
- thermoplastics
- thermosetting plastics
2
Q
thermoplastic
A
*don’t change chemically when heated
*e.g; polyethylene, polystyrene, polyvinyl chloride
3
Q
thermosetting plastics
A
*shaped only once when heated and solidified(chemical reaction cannot be reversed)
*epoxy, rubber, bakelite, polyester fibreglass
4
Q
what are plastics produced from
A
crude oil and natural gases
5
Q
properties of thermoplastics
A
*can be molded over and over again
*easy to work with
*strong and sometimes transparent
*good insulators
*low in tensile strength
6
Q
thermosetting plastics
A
*difficult to work with
*hard and brittle
*heat resistant
*high in tensile strength
7
Q
reduce
A
to use less (avoid making waste)
8
Q
reuse
A
use something over and over again
9
Q
recycle
A
make new products from old things (don’t throw everything into the trash)
