thermo plastic polymers

Question 1

thermosplastics molecular structure has no ____ rods.

Answer 1

cross link.

Question 2

they are self _____ and _____. the can be _____.

Answer 2

finished. coloured.

recycled.

Question 3

the plastic ____ _____ _______ can be used to make yoghurt pots and disposable food containers. it is moulded through _____ forming or _____ moulding. its price is ____.

Answer 3

high impact polystyrene (HIPS).
vacuum.
injection.
cheap.

Question 4

expanded _____ is light weight and a good heat insulator. its common use is insulation and _____.

Answer 4

polystyrene.

packaging.

Question 5

___ is a tough plastic that can be ____. it is ____ moulded to make hollow objects such as drinks bottles. the cost is ____.

Answer 5

PET.
clear.
blow.
cheap.

Question 6

the plastic ___ is durable and the cost is ______. it is used to make casing for monitors and safety helmets. this plastic does not come in ____.

Answer 6

ABS.
expensive.
clear.

Question 7

______ is a though _____ moulded plastic. it is used to make sandwich boxes and chairs. it is not ____ but comes in colours.

Answer 7

polypropylene (PP).
injection.
clear.

Question 8

_____ has few industrial uses such as headlights and ____ ____. its is _____ clear than ____ but it ______ easily. it can be ______ moulded or _______.

Answer 8

acrylic.
shop signs. 
optically. glass.
injection.
fabricated.

Question 9

___ is commonly used to make ____ pencil cases, tape and hose pipes. its is moulded through ______.

Answer 9

PVC.
clear.
calendaring.

Question 10

there are two types of ________, LDPE (plastic bags) they are ___, a good chemical resistance and has a ____ feel. HDPE (bowls, buckets and bottles)

Answer 10

polythene.
soft.
waxy.

Question 11

____ is a self lubricating plastic that resists ___. its common uses are combs and gears.

Answer 11

nylon.

wear.