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DT > Polymers > Flashcards

Polymers Flashcards

1
Q

What are thermoforming polymers

A

Polymers that can be heated and reheated over and over again without any deterioration

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2
Q

Properties of Polypropylene (PP)

A

Flexible, tough, lightweight, food safe.

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3
Q

Uses of Polypropylene (PP)

A

Kitchen, medical products, rope

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4
Q

Properties of High density polyethylene (HDPE)

A

Lightweight, rip and chemical resistant

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5
Q

Uses of high density polyethylene (HDPE)

A

Milk bottles, pipes, creates, wheelie bins.

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6
Q

Properties of high impact polystyrene (HIPS)

A

Flexible, impact resistant, lightweight, can be food safe, used for vacuum forming

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7
Q

Uses of high impact polystyrene (HIPS)

A

Yoghurt pots, vacuum formed products

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8
Q

Properties of polyethylene terephthalate (PET)

A

Blow moulded, chemically resistant and fully recyclable

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9
Q

Uses of polyethylene terephthalate (PET)

A

Drink bottles, food containers, yarn.

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10
Q

Properties of acrylic (PMMA)

A

Tough but brittle when thin. Easily scratched, formed and bonded.

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11
Q

Uses of acrylic (PMMA)

A

Car lights, alternative to glass, modern baths, clothing.

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12
Q

Properties of polyvinyl chloride (PVC)

A

Flexible, easily extruded, tough and resistant to chemicals

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13
Q

Uses of polyvinyl chloride (PVC)

A

Raincoats, pipes, electrical tape.

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14
Q

Examples of thermoforming polymers

A

Polypropylene, acrylic, polyvinyl chloride

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15
Q

What is a thermosetting polymer

A

Plastics that have rigid cross-linked polymer chains that are set when heated and cannot be reformed

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16
Q

Properties of polyester resin (PR)

A

good electrical insulator, hard, but becomes tough when mixed with glass strands to form glass reinforced plastic

17
Q

Uses of polyester resin (PR)

A

Encapsulation, boat hulls as GRP

18
Q

Properties of urea formaldehyde (UF)

A

High tensile strength, heat resistant, good electrical insulator, hard, brittle, easily injection moulded.

19
Q

Uses of urea formaldehyde (UF)

A

Adhesives for bonding particle boards, decorative laminates, electrical casings.

20
Q

Properties of Epoxy resin (ER)

A

Good strength to weight ratio, good electrical insulator, heat resistant

21
Q

Uses of epoxy resin (ER)

A

Bonding waterproof coatings, electronic circuit boards.

22
Q

Properties of phenol formaldehyde (PF)

A

Heat resistant and a good electrical insulator.

23
Q

Uses of phenol formaldehyde (PF)

A

Heat resistant handles, electrical components, snooker balls

24
Q

Properties of melamine formaldehyde (MF)

A

Lightweight, hard but brittle.

25
Q

Uses of melamine formaldehyde (MF)

A

Worktops, surfaces, some kitchenware

26
Q

Examples of thermosetting polymers

A

Urea formaldehyde, polyester resin, epoxy resin

DT (6 decks)

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