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DT > Polymers > Flashcards

Polymers Flashcards

1
Q

What are thermoplastics?

A

weak chemical bonds
can be remoulded when heated = can be recycled = good for environment
cheaper

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2
Q

What is ABS?

A

lego, kitchen plastic containers

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3
Q

What is PA (nylon)?

A

needs strength and flexibility - fishing wire

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4
Q

What is PP (polypropene)?

A

cheap large goods (bins, storage containers) and bottles

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5
Q

What is PET?

A

high quality plastic bottles

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6
Q

What is LPDE?

A

toothpaste tubes, plastic bags

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7
Q

What is HPDE?

A

plastic containers (eg bleach bottle) - excellent blow moulding

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8
Q

What is HIPS?

A

food packaging (excellent vacuum forming )

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9
Q

What is PVC?

A

wire casing, tape cloth

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10
Q

What are thermosetting plastics?

A

strong chemical bonds
cannot be remoulded (resistance to heat + chemicals) = cannot be recycled = bad for environment
more expensive

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11
Q

What is melamine formaldehyde?

A

replace potery/glass/metal
plastics plates/cups
table tops

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12
Q

What is urea formaldehyde?

A

plugs
toilet seat

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13
Q

What is epoxy resin?

A

adehesive in composites

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14
Q

What are biopolymers?

A

non-oil based polymers

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15
Q

What is natural biopolymers and examples?

A

made from natural materials (eg. cellulose or starch) to naturally break down
- cornstarch polymers - food packaging, cups, disposable nappies
- potatopak - disposable plates/mugs/cultlery
- biopol (veg + corn) - disposable plastic products

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16
Q

What are synthetic polymers?

A

made from sustainable sources, but engineered to break down

17
Q

What is polyactide?

A

(veg and corn starches) disposable bottles

18
Q

What is PHA?

A

fermentation of fats and sugars

19
Q

What are some disadvantages of biopolymers?

A
  • give off methane when biodegrade
  • can’t be recycled - encourage throw away society
  • need large amount of crop to produce (people starving)
  • more expensive

DT (6 decks)

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