Polymers Flashcards by Liam Maull

Q

What is a Thermoplastic?

A

denoting substances (especially synthetic resins) that become plastic on heating and harden on cooling, and are able to repeat these processes.

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Q

What is a Thermosetting plastic?

A

denoting substances (especially synthetic resins) which set permanently when heated.

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Q

Thermoplastic or Thermosetting Plastic?

Nylon

A

Thermoplastic

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Q

Thermoplastic or Thermosetting Plastic?

Polythene

A

Thermoplastic

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Q

Thermoplastic or Thermosetting Plastic?

Polyester resin

A

Thermosetting plastic

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Q

Thermoplastic or Thermosetting Plastic?

Urea-Formaldehyde

A

Thermosetting plastic

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Q

Thermoplastic or Thermosetting Plastic?

Acrylic

A

Thermoplastic

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Q

Thermoplastic or Thermosetting Plastic?

Epoxy Resin

A

Thermosetting plastic

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Q

Thermoplastic or Thermosetting Plastic?

ABS - Acrylonitrile butadiene styrene

A

Thermoplastic

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Q

Thermoplastic or Thermosetting Plastic?

PVCu -Polyvinyl chloride

A

Thermoplastic

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Q

Thermoplastic or Thermosetting Plastic?

Melamine-formaldehyde

A

Thermosetting plastic

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Q

True or false?

ABS has a high melting point

A

False, ABS has a low melting point

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Q

How is ABS Manufacturing?

A

Injection moulding

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Q

ABS Uses (2)

A

Wall sockets

Lego

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Q

PVCu properties (3)

A

Strong
Lightweight
Cheap

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Q

PVCu Uses (1)

A

Used in construction

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Q

PVCu manufacturing

A

Emulsion

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Q

Acrylic properties (3)

A

Flexible
Shock resistant
Transparent

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Q

Acrylic Uses (1)

A

Windows

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Q

Acrylic manufacturing

A

bulk polymerization

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Q

Polythene Properties (3)

A

Low strength
Strong
Ductile

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Q

Polythene Uses (2)

A

Shopping bags

Water pipes

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Q

Polythene manufacturing

A

Extrusion

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Q

Nylon Properties (3)

A

Very strong
Washable
Heat resistant

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Nylon Uses (3)

Swimwear Sports clothing Rope

Polyethylene properties (3)

Tensile Electric insulation properties Chemical resistant

Polyethylene Manufacturing

Injection moulding

Polyethylene Properties (3)

Elastic Tough Resistant to electricity

Polyethylene Uses (3)

Packaging Toys Car parts

What does PP stand for?

Polypropylene

What does PE stand for?

Polyethylene

What does HDPE stand for?

High density Polyethylene

What does LDPE stand for?

Low density Polyethylene

What does PET stand for?

Polyethylene Terephthalate

PET properties (3)

Clear Strong Lightweight

PET Uses (1)

Packaging food and beverages- plastic bottles

Thermoplastic or Thermosetting Plastic? | LDPE (low-density polyethylene)

Thermoplastic

Thermoplastic or Thermosetting Plastic? | HDPE (high-density polyethylene)

Thermoplastic

Thermoplastic or Thermosetting Plastic? | PP (polypropylene)

Thermoplastic

Thermoplastic or Thermosetting Plastic? | HIPS (high-impact polystyrene)

Thermoplastic

Thermoplastic or Thermosetting Plastic? | PET (polyethylene terephthalate)

Thermoplastic

Thermoplastic or Thermosetting Plastic? | uPVC (rigid polyvinyl chloride)

Thermoplastic

Thermoplastic or Thermosetting Plastic? | Flexible Polyvinyl chloride

Thermoplastic

True or False | HDPE is available in translucent form

True

Gap fill - difference between LDPE and HDPE Although both materials are polyethylene, they do have different properties. LDPE is ______, more flexible and melts at a _____ temperature than HDPE. LDPE is used in sandwich bags and other types of _________. HDPE is ______, has a ______ chemical resistance and can withstand higher temperatures.

Softer, lower, packaging, harder, higher

What costs 5p and is made from LDPE?

Carrier bags

What would you expect to find made out of LDPE in a grocery store? (5)

Food wrap film, food trays, bin liners, detergent bottles, general packaging

True or False? | LDPE is not available in translucent form.

False - it can be translucent

True or False? | LDPE can be formed by all Thermoplastic manufacturing methods

True

What are some other mechanical Properties of LDPE? (3)

Good impact resistance Low tensile strength Highly ductile

What are some limitations of LDPE? (3)

Flammable Not very stiff Not suited to extreme temperatures

Why is LDPE good for food related items?

Good chemical resistance

Why has HDPE recently been used for garden furniture? (2)

Resists the weather and can be cleaned easily

True of false? | HDPE is not recyclable

False

Why might HDPE be used for children’s furniture? e.g. chairs in schools. (3)

it has a Low density, tough and has high tensile strength

What other products are made from HDPE? (3)

Chemical drums, water containers and household and kitchenware.

What can be made from both LDPE and HDPE?

Toys

Why is HDPE perfect for the injection moulding and blow moulding? (4)

It’s Tough, rigid, good stiffness, stress cracking resistance

True or False? | PP is a good electrical Conductor.

False, PP is a good electrical insulator.

What are the mechanical properties of PP? (3)

Good impact resistance, tough, good elasticity

Why is PP used in injection moulding? (3)

Low liquid-state viscosity, low melting point, it’s a Thermoplastic

Other than injection moulding, what is another common way PP is manufactured?

Extrusion Blow Moulding

True or False | PP can be used for car dashboards and bumpers

True

Gap Fill - PP uses Polypropylene fibre is a main material in home furnishings such as __________ and indoor-outdoor carpets. Numerous industrial end uses exist as well, including ____ and cordage, disposable non-woven fabrics for _______ and _______ applications, and nonwoven fabrics for ground stabilization and reinforcement in ____________ and road paving.

Upholstery, rope, Nappies, medical, construction

Is ABS opaque or translucent?

Can be both translucent and opaque

What plastic is LEGO made from?

ABS

Why can ABS be injection moulded? (2)

Low ,elating point and is a Thermoplastic

What are the mechanical properties of ABS? (3)

Hard, Tough, good impact resistance

What plastic is used more in the food industry? | LDPE or ABS

ABS

Why is LDPE used more than ABS in the food industry?

Cheaper

True or false? | ABS is biodegradable

False, it is not

Gap fill - ABS in households Used of ABS in appliances include appliance _______ panels, housings (shavers, _______ cleaners, food processors), ____________ liners, ________ keycaps are commonly made out of ABS.

Control, vacuum, refrigerator, Keyboard

Why might pipes be made from ABS?

It doesn’t rust or corrode

What does HIPS stand for?

High-impact polystyrene