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AQA GCSE Additional Chemistry C2a > Polymers > Flashcards

Polymers Flashcards

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1
Q

Give the features of thermo-setting

A

Cross links - very strong
High melting point
Cant be remolded easy
Hard and rigid

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2
Q

Give examples of where thermo-setting is used

A

rulers, yoghurt pots.

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3
Q

State the features of thermo-softening

A

Weak forces of attraction
Low melting point
Remouldable
Soft and flexible

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4
Q

Give an example where thermo-softening is used

A

Plastic bags

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5
Q

What are the reaction conditons of Low Density Polyethene (LDPE)

A

Temp- 200 degrees
Pressure - 2000atm
Catalyst - trace of oxygen

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6
Q

What are the reaction conditons of High Density Polyethene (HDPE)

A

Temp - 60 degrees
Pressure - 2atm
Catalysyt - Ziegler-Natta

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AQA GCSE Additional Chemistry C2a (11 decks)

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