Plastics Flashcards

(37 cards)

1
Q

What is the molecular structure of thermo plastic.

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In a polymer chain what is one circle thing called.

A

A monomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the 4 properties of thermoplastics

A

Remouldable

Recyclable

Self Coloured

Self Finishing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What symbol do all thermo plastics have

A

The three arrow triangle recyclable with the number in the center and a letter below representing the plastic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How long does it take for a thermo plastic to degrade

A

100+ years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What plastic is Lego made of

A

ABS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does ABS make

A

High quality toys

mobile phones

Safety helmets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the three main properties of ABS

A

Hard

strong

durable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the negative point of ABS

A

expensive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What plastic is a bottle made of

A

PET

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the two good points of PET

A

It can be compleatly clear

and it is strong when thin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the bad point of PET

A

It has a cheap crinkly feel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a sandwhich box made of and why

A

Polypropylene because it is soft tough and supple and it can have integral hinges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does HIPS stand for

A

High impact polystyrene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does LDPE and HDPE stand for

A

Low Density Poly-Ethylene

and

High Density Poly-Ethylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a plastic bag made of and why

A

LDPE because in is encredable strong when extramly thin. and it can be made 0.1mm thick

17
Q

What can polystyrene be used to make.

A

Yogurt pots and dispoable food containers.

18
Q

What is the stock forms of plastic

A

Sheets tubes and granules

19
Q

Name the 4 additives and what they do

A

Platicizer=changes natural properties and makes it easyer to process

Filler=replaces polymer and reduces cost

stabilizer=stop deterioriating over time

bio batch=make thermo polymers biodegrade in less then 5 years

20
Q

What is line bending

A

lie acrylic over simple heating element until hot and bend ovver a mould or jig.

21
Q

What is drape moulding

A

Heat plastic to 150degrees not molten drape over simple wooden mold.

22
Q

What is vacuum forming

23
Q

What is injecton moulding

A

Heat plastic granuals

push in to mold make solid shape

24
Q

What is blow moulding

A

Plastic tube is inserted in to mould blow high presure air into the tube to make product

25
What is extrution moulding and what is it used for
Heat plastic push through mould make tube Used to make straws, hoses
26
What is rotatinal moulding and what is it used for
Moulten plastic put on mould surounded by heater and this is spun to make hollow object. used to make cheap balls.
27
what is the molecular structure of thermosetting plastic
28
5 properties of thermorsetting plastic
no remouldable or recyclable self colouring or painted self finishing do not melt
29
What plastic makes electrical fittings and why
Urea Formaldehyde it is a good electrical insulator and it is strong
30
what is Melamine formaldehyde used to make and why
Heat resistence surfeces resists some chemicals and stains
31
What is Polyester resin used to make and why
Glass renforced plastic hard, brittle unless laminated, good electrical insulator, resists chemicals well
32
what is compression moulding
block of soft plastic in female mould former is pushed in to make product,
33
What is calendaring
A series of rollers that stretch the plastic in to a thing strip
34
What does TPE stand for and what is it used to make
TPE=thermo plastic elastomer Its an elastomer Has no crosslinks used for ergonomic over grips
35
What does LSR stand for and what is it used for
Liquid silicone rubber Its an elastomer Used for cook ware
36
what is BioPol PLA
Its makes plastic brake down in 6 months often used in place of ABS can be soft like LDPE used in medical implants
37
What is Lactel what is it used for
Its used for slow release medical capsules and dishwasher tablets It is an water absorbing soluble polymer breaks down in mins