polymers Flashcards
thermoforming or thermosetting: known as thermo pastics
thermoforming
thermoforming or thermosetting: known as thermo sets
thermosetting
thermoforming or thermosetting: have strong chemical bonds
thermosetting
thermoforming or thermosetting: can be re-moulded without affecting the materials physical properties
thermoforming
thermoforming or thermosetting: long chains of loose molecules
thermoforming
thermoforming or thermosetting: have strong cross links
thermosetting
pros of thermosetting:
hard
can withstand high temp
durable
cons of thermosetting
cannot be remodeled
cant be recycled
pros of thermoforming
good quality
highly skilled operator is not needed
cons of thermoforming
costly
can only have large plastic sheets
properties of hardwood
sheds leaves
thick trunks
takes long grow
properties of softwood
doesnt shed
thin trunks
doesnt take long to grow
stock form of hardwood
PSE
stock form of softwood
Dowel
stock form of manufactured wood
sheet